After spending years organizing, editing, and perfecting your photo library, the thought of moving your Lightroom catalog to a new computer can feel overwhelming. I have helped dozens of photographers through this exact process, and I can tell you that yes, you absolutely can move your Lightroom catalog to a new computer without losing any of your work. The key is understanding what files to copy and following the right sequence of steps.
In this guide on how to migrate your Lightroom catalog and photos to a new computer or external drive, I will walk you through the entire process from start to finish. Whether you are upgrading to a faster machine, moving your workflow to an external drive, or transitioning between Mac and Windows, you will find everything you need to complete the transfer safely. I will also cover common pitfalls that cause photographers to lose their edits, so you can avoid the mistakes I have seen others make.
Understanding the Lightroom Catalog System
Before you move anything, you need to understand what a Lightroom catalog actually is. The catalog is a database file with the extension .lrcat that stores all the information about your photos. This includes your edits, ratings, keywords, collections, virtual copies, and organization. The important distinction here is that the catalog does not contain your actual image files. It only contains references to where those files are stored on your computer.
Think of the catalog like a library card catalog. The cards tell you where to find the books, but the cards are not the books themselves. Your photos are the books, stored in folders on your hard drives or external drives. The catalog just remembers where they are and what you have done to them.
Alongside your main .lrcat file, you will see related files like .lrcat-data and preview files ending in .lrdata. The lrcat-data file stores additional metadata and settings, while preview files contain the rendered previews Lightroom uses to display your images quickly. When you migrate your catalog, you need to copy all of these files together to preserve your complete workflow.
Pre-Transfer Checklist: What You Need Before Starting
I recommend gathering everything you need before you begin the migration process. This prevents frustrating interruptions halfway through a large file transfer. Here is what you should have ready:
External hard drive or transfer medium: You need somewhere to copy your catalog and photos during the transfer. An external SSD works best for speed, but any external drive with enough capacity will work. For large photo libraries, make sure the drive has at least 50% more space than your current catalog and photos combined.
Lightroom installed on the new computer: Install Lightroom Classic on your destination machine before you start the transfer. You do not need to open it or create a new catalog. Just having the software installed and activated saves time later.
Time estimate: A small catalog with a few thousand photos might transfer in under an hour. Large catalogs with tens of thousands of images and extensive preview files can take several hours to copy. Plan accordingly and do not rush the process.
Backup of your existing catalog: I cannot stress this enough. Create a backup of your catalog before you move anything. If something goes wrong during the transfer, you want a safety net. I will cover the backup process in detail in the next section.
How to Find Your Current Lightroom Catalog Location
The first step in any catalog migration is knowing where your catalog files are currently stored. Lightroom makes this easy to find, but the method differs slightly between Windows and Mac.
On Windows: Open Lightroom Classic and go to Edit > Catalog Settings. Click the General tab. You will see the catalog location displayed at the top. Click the Show button to open Windows Explorer directly to that folder. The default location is usually in your Pictures folder under a Lightroom subfolder.
On Mac: Open Lightroom Classic and go to Lightroom Classic > Catalog Settings. Click the General tab. The catalog location appears at the top. Click Show to reveal the catalog in Finder. The default location is typically in your Pictures folder.
When you open this folder, you will see several files. The main file you need is the one ending in .lrcat. You will also see a folder with the same name ending in .lrdata that contains your previews. There may also be a .lrcat-data file. Copy all of these together. Do not separate them.
Backing Up Your Catalog Before Transfer
Before you copy any files to your transfer drive, create a backup of your catalog. This step takes only a few minutes and can save you from catastrophe if something goes wrong during the migration.
Lightroom has a built-in backup feature that I recommend using. When you exit Lightroom, you may see a prompt asking if you want to back up your catalog. If you have dismissed this prompt in the settings, you can trigger a backup manually by going to File > Catalog Settings and checking the backup frequency settings.
For migration purposes, I recommend performing an integrity check during the backup. In the backup dialog, check the option to Test integrity before backing up. This verifies that your catalog database is healthy before you copy it. If the integrity check fails, do not proceed with the migration until you resolve the catalog issues.
Store this backup in a location separate from your working catalog. An external drive or cloud storage service works well. Once you have confirmed the backup is complete, you can proceed with the migration process.
Transfer Methods: Full Catalog vs Export as Catalog
There are two main approaches to migrating your Lightroom catalog, and each has its place depending on your situation. Understanding the difference helps you choose the right method.
Full Catalog Copy: This method involves copying your entire catalog folder to the new location. You copy the .lrcat file, the preview folder, and all associated files exactly as they are. This is the most common approach and works well when you want to move your complete workflow to a new computer. The advantage is simplicity. Everything transfers together, and you maintain your exact setup. The disadvantage is that you copy everything, including old previews and data you might not need.
Export as Catalog: This method lets you select specific photos or folders and export them as a new, separate catalog. You access this feature by selecting photos in Lightroom and choosing File > Export as Catalog. This creates a new catalog containing only the selected images and their edits. Use this method when you want to transfer only part of your library, when you want to start fresh without old preview files, or when you need to share a subset of photos with another computer.
For most photographers moving to a new computer, the full catalog copy method is the right choice. It preserves your complete workflow with minimal risk. I will cover both methods in the step-by-step sections that follow.
Step-by-Step: Transfer to a New Computer
This section walks you through the complete process of moving your Lightroom catalog to a new computer. Follow these steps in order, and do not skip any steps.
Step 1: Close Lightroom on your old computer. Make sure Lightroom is completely closed before you begin copying files. If Lightroom is running, some files may be locked and will not copy correctly.
Step 2: Copy your catalog folder to an external drive. Navigate to your catalog location using the method I described earlier. Select the entire catalog folder, including the .lrcat file, the .lrdata preview folder, and any .lrcat-data files. Copy this entire folder to your external transfer drive.
Step 3: Copy your photo folders. If your photos are stored on the same computer as your catalog, you need to copy them as well. Navigate to your photo folders and copy them to your external drive. Maintain the same folder structure. If your photos are already on an external drive, you can skip this step.
Step 4: Connect the external drive to your new computer. Plug in your external drive to the destination computer. Make sure it appears in File Explorer (Windows) or Finder (Mac).
Step 5: Copy files to the new computer. Copy the catalog folder from the external drive to your desired location on the new computer. I recommend placing it in your Pictures folder for consistency. Then copy your photo folders to their new location, maintaining the same folder structure as before.
Step 6: Open the catalog on the new computer. Open Lightroom Classic on the new computer. Go to File > Open Catalog and navigate to the .lrcat file you just copied. Select it and click Open. Lightroom may ask if you want to upgrade the catalog if you are moving to a newer version of Lightroom. Allow the upgrade to proceed.
Step 7: Check for missing photos. If your photos appear with question marks or exclamation points, Lightroom cannot find them at their old location. Do not panic. I will cover how to fix this in the reconnecting section later in this guide.
Important note for Windows users: If you store your photos on an external drive, the drive letter may change when you connect it to a new computer. If your photos were on drive E: before but the external drive now shows as F:, Lightroom will show all your photos as missing. You can prevent this by assigning a consistent drive letter through Windows Disk Management before you open the catalog on the new computer.
How to Move Your Lightroom Catalog to an External Drive
Working from an external drive is increasingly common, especially for photographers who need to move between computers or who have outgrown their internal storage. The process is similar to transferring to a new computer but with some important differences.
Step 1: Close Lightroom completely. As with any catalog move, make sure Lightroom is not running before you begin.
Step 2: Copy the catalog folder to the external drive. Navigate to your catalog location and copy the entire catalog folder to your external drive. Choose a location that makes sense for your workflow. I recommend creating a dedicated folder for your Lightroom work to keep things organized.
Step 3: Open the catalog from the new location. Connect your external drive and open Lightroom. Go to File > Open Catalog and navigate to the catalog file on the external drive. Select it and click Open.
Step 4: Update your preferences. Once the catalog opens successfully from the external drive, go to Edit > Preferences (Windows) or Lightroom Classic > Preferences (Mac). Under the Presets tab, check the option to store presets with the catalog if you want your presets to travel with your catalog.
Step 5: Verify everything works. Check a few images to make sure your edits are intact and your presets are available. If everything looks good, you can delete the old catalog from your internal drive after making sure you have a backup.
Keep in mind that working from an external drive can affect performance, especially if you are using an older USB drive. A USB 3.0 or Thunderbolt SSD will give you the best experience. If you notice sluggishness, consider keeping your catalog on your internal drive and only storing your photos on the external drive.
How to Reconnect Missing Photos After Transfer
Seeing hundreds or thousands of photos marked as missing is one of the most stressful parts of catalog migration. Fortunately, reconnecting them is usually straightforward once you understand the process.
Photos show as missing when Lightroom cannot find them at the file path stored in the catalog. This happens most often when the folder structure has changed or when the drive letter has changed on Windows. You will see a question mark icon on folders in the Folders panel and an exclamation point on individual photos.
To reconnect a missing folder: Right-click on the folder with the question mark in the Folders panel and select Find Missing Folder. Navigate to the new location of that folder and select it. Lightroom will update the catalog to point to the new location, and all photos in that folder will reconnect automatically.
To reconnect multiple folders at once: If you have many missing folders, you can save time by reconnecting a parent folder. If your entire photo library has moved, right-click on the top-level folder with the question mark and select Find Missing Folder. Point it to the new top-level location, and Lightroom will attempt to reconnect all subfolders automatically.
Preventing missing photos: The best way to avoid this issue is to maintain the same folder structure on the new computer or drive. If your photos were in a folder called Photos on your old computer, put them in a folder called Photos on the new computer. The exact path does not have to match perfectly, but the relative structure within your photo folders should remain consistent.
If you still have missing photos after reconnecting folders, check for photos that were stored in unusual locations on your old computer. Photos on your desktop, in your Downloads folder, or scattered across multiple drives are easy to miss during the transfer process.
Transferring Presets, Watermarks, and Custom Settings
Your presets and custom settings do not always travel with your catalog. Depending on your Lightroom settings, they may be stored in a separate location on your computer. Here is how to make sure everything transfers.
Check where your presets are stored: In Lightroom, go to Preferences > Presets. Look for the option that says Store presets with this catalog. If this is checked, your presets are already in your catalog folder and will transfer automatically. If it is unchecked, your presets are stored in a separate location on your computer.
Windows preset location: If your presets are not stored with the catalog, they are typically located at C:Users[YourUsername]AppDataRoamingAdobeLightroom. The AppData folder is hidden by default, so you may need to enable Show Hidden Items in File Explorer to see it.
Mac preset location: On Mac, look in ~Library/Application Support/Adobe/Lightroom/. The Library folder is hidden by default. To access it, hold the Option key and click Go in Finder, then select Library.
Export and import method: If you cannot find your preset folders or prefer a simpler approach, you can export your presets from within Lightroom. Go to Edit > Presets (Windows) or Lightroom Classic > Presets (Mac). Click the button to Show Lightroom Presets Folder. Copy this entire folder to your external drive and place it in the same location on your new computer.
Watermarks and filename templates: These settings are stored separately from develop presets. You can find them in the same general locations, in subfolders called Watermarks and Filename Templates. Copy these folders as well to preserve your custom watermarks and export settings.
Post-Transfer Verification: Making Sure Everything Works
Before you delete your old catalog or wipe your old computer, take some time to verify that everything transferred correctly. A few minutes of checking now can save you from discovering missing edits later.
Check for missing photos: Scroll through your Folders panel and look for any folders with question marks. Also check your All Photographs collection for individual photos with exclamation points. Address any missing photos using the reconnecting process before moving on.
Verify your collections: Open a few of your collections and make sure the photos appear correctly. Collections should transfer intact, but it is worth checking a few to be sure.
Test your develop presets: Apply a few of your favorite presets to test images. Make sure they work as expected and produce the same results as before.
Check edit history: Open some images that have extensive edits and check their history. You should see all your previous adjustments listed in the History panel.
Optimize your catalog: After a major transfer, I recommend optimizing your catalog. Go to File > Optimize Catalog. This process cleans up the catalog database and can improve performance. It may take some time for large catalogs, but it is worth doing.
Troubleshooting Common Migration Issues
Even when you follow all the steps carefully, issues can arise. Here are solutions to the most common problems photographers encounter during catalog migration.
Catalog Won’t Open on New Computer
If Lightroom refuses to open your catalog on the new computer, the catalog file may have been corrupted during the copy process. First, try copying the catalog again from your backup. If the backup also fails, the corruption may have existed before the transfer. In this case, try opening the catalog on your old computer and running an integrity check through the backup dialog. If the catalog passes the integrity check, export your photos as a new catalog using the Export as Catalog feature and try again.
Photos Still Showing as Missing After Reconnecting
If you have reconnected your folders but some photos still show as missing, those photos may have been in a different folder than you expected. Use the Find All Missing Photos feature in the Library module to see every photo that Lightroom cannot locate. This helps you identify folders you may have missed during the transfer.
Drive Letter Changed on Windows
This is one of the most frustrating issues for Windows users. When you connect an external drive to a different computer or even reconnect it after a restart, Windows may assign it a different drive letter. Lightroom stores the full path including the drive letter, so any change breaks the connection. To fix this permanently, assign a static drive letter through Windows Disk Management. Press Win + X and select Disk Management. Right-click your external drive, select Change Drive Letter and Paths, and assign a letter that will not conflict with other drives.
Cross-Platform Transfer (Mac to Windows or Windows to Mac)
Cross-platform transfers add complexity because Mac and Windows use different file systems and path structures. The catalog file itself is compatible, but you need to pay attention to file paths. When you open a Mac catalog on Windows or vice versa, expect to see missing photos. Use the folder reconnection process to point Lightroom to the correct locations on the new platform. Also be aware that external drives formatted for Mac may not be readable on Windows without additional software. Consider using exFAT format for external drives that need to work on both platforms.
Large Catalog Transfer Takes Too Long
Catalogs with extensive preview libraries can be enormous, sometimes exceeding 100GB. Transferring files of this size takes time. If you are working with a very large catalog, consider using the Export as Catalog feature to create a smaller catalog without the preview files. You can also discard 1:1 previews before transferring by going to Library > Previews > Discard 1:1 Previews. Lightroom will rebuild these previews as needed on the new computer.
Performance Issues After Migration
If Lightroom feels sluggish after the transfer, the catalog may need optimization. Run the Optimize Catalog command from the File menu. Also check your Camera Raw cache settings in Preferences. If the cache is pointing to an old location, update it. Finally, if you are working from an external drive, the drive speed may be the bottleneck. USB 2.0 drives are too slow for comfortable editing. Upgrade to USB 3.0 or Thunderbolt for better performance.
Frequently Asked Questions
Can I move my Lightroom catalog to a new computer?
Do I need to keep old Lightroom catalogues?
How do I export my entire Lightroom catalog?
Where is the best place to save your Lightroom catalogs?
Will I lose my edits when moving my Lightroom catalog?
Do I need to move preview files when transferring my catalog?
Can I put my Lightroom catalog on an external drive?
How do I transfer Lightroom from Mac to PC?
Final Thoughts
Migrating your Lightroom catalog and photos to a new computer or external drive may seem intimidating at first, but when you break it down into clear steps, the process becomes manageable. The most important things to remember are to back up your catalog before you start, copy all the catalog files together, and maintain your photo folder structure. Following these principles ensures that your years of editing work and organization transfer safely to your new setup.
Take your time with the verification process after the transfer. Check your collections, test your presets, and make sure all your photos reconnect properly. It is far better to spend an extra hour verifying everything works than to discover missing edits after you have already wiped your old computer. And always keep regular backups of your catalog going forward, because your photography work is too valuable to lose to a single hard drive failure.
If you run into issues during the migration, refer back to the troubleshooting section in this guide. Most problems have straightforward solutions, whether it is reconnecting missing folders or dealing with Windows drive letter changes. With the right approach, you can learn how to migrate your Lightroom catalog and photos to a new computer or external drive confidently and protect the creative work you have invested in your photo library.