Find duplicate photos on your external hard drive, without deleting the wrong one
A photographer's drive fills up with duplicates without anyone noticing. Cleaning up can free a lot of space, as long as you never delete the last copy of a photo. Here's how to go about it.
By William Desse, photographer · October 16, 2026
Where duplicates come from on a photographer's drive
Nobody copies the same photo twice on purpose. Duplicates pile up through small habits:
- A card copied twice, because you weren't sure the first copy was complete.
- Both cards of a dual-slot pair copied into their own folders, even though they hold the same files.
- A card you never format (drone, 360, action cam) copied in full after every outing, previous outings included.
- An archive copied from one drive to another, then reorganized, until you no longer know which version is the right one.
- Files renamed over successive deliveries, hiding the fact that they're identical to the original.
The result: a drive full sooner than planned, slower backups, and an archive you can't find your way around.
Duplicate or similar photo?
This is the most important distinction before you clean up.
| Case | Duplicate? | Why |
|---|---|---|
| The same RAW copied twice, even under another name | Yes | Identical content, byte for byte: one copy is enough. |
| A RAW and its JPEG shot together | No | Two different files that serve two purposes. |
| Two frames from a burst | No | They look alike, but one may be sharp and the other blurred. |
| A JPEG export or an edited version | No | That's your work, not a copy. |
A true duplicate has strictly identical content. Everything else is culling, and that's your job, not something for software that “thinks” one photo is as good as another.
Before you clean up
- Make sure your backups are up to date. A cleanup always starts with a full backup, just in case. The method is in the 3-2-1 backup rule for photographers.
- Mind your Lightroom or Capture One catalog. If you move a file the catalog references outside the software, it will show up as missing. Always keep the copy that sits in the folder your catalog uses.
- Don't delete anything directly. Set the extra copies aside in a separate folder first, check, and only delete afterwards.
Free tools
There are free, general-purpose tools such as dupeGuru that look for duplicates across every type of file. They do their job well, but they know nothing about your work: it's up to you to decide, group by group, which copy to keep, without picking the wrong folder. On an archive spanning several years, that's thousands of decisions.
With Récolte: a cleanup with no risk
Récolte's Find duplicates tool was designed for a photographer's archive, with one simple rule: one copy always stays.
Several folders, several drives
Add two or more folders, on one or several drives, subfolders included if you want. Récolte compares the content of every photo, video and audio file, and groups strictly identical files, even renamed ones. Documents and other files are left out.
A rule to choose which copy to keep
Instead of deciding group by group, you pick a rule that applies to everything at once: keep the copy in the priority folder (your catalog's, for example), the oldest, the newest, or the longest or shortest name. You can also keep or set aside by file name, with a pattern such as “AO1A” or “_copy”. Then fix by hand whatever you want.
Filters for big cleanups
Results can be filtered by extension, size and folder. You can tick every duplicate in a subfolder at once: Récolte makes sure one copy always remains somewhere else.
Nothing is ever deleted
The ticked copies are moved into a review folder, next to each file on its own drive, or gathered in a folder you choose, keeping the original folder structure. Récolte deletes nothing: you check the contents, then delete them yourself when you're sure.
Avoid duplicates at copy time
The best duplicate is the one you never create. When you offload your cards with Récolte, files already secured from another card in the same project aren't copied again, whether it's the twin card of a dual-slot pair or a card inserted again later in the same project.
Your checklist
- Backups up to date before you start.
- A priority folder set: the one your catalog uses.
- Only identical files treated as duplicates, never similar-looking photos.
- Move, check, then delete, in that order.
FAQ
Does Récolte delete my duplicates?
No. Récolte moves the extra copies into a review folder and never deletes anything. You check that folder, then delete it yourself when you're sure.
Does Récolte find similar-looking photos?
No, on purpose. Récolte only flags strictly identical files. A burst, a JPEG export of a RAW or an edited version are different files: sorting those is your call, not software's.
Are duplicates found even if a file was renamed?
Yes. The comparison is based on the file's content, not its name or date. An IMG_0421.CR3 renamed Smith-Wedding-0421.CR3 is recognized as the same file.
Does it work with the Apple Photos library or an iPhone?
No. Récolte works on folders of files, on drives connected to a Mac or a Windows PC. It doesn't touch the Apple Photos library or the photos on a phone.
Which files are scanned?
Media files: RAW, JPEG, HEIC, TIFF, video and audio. Documents and other files aren't compared.