Mistakes When Renaming a Huge Photo Dump
Renaming thousands of photos in one pass can destroy the only order the camera gave you. Here is how to avoid that.
A fresh copy of a camera card looks like chaos, so a batch rename looks like progress. In one move you can stamp every file with a date and a wedding name. You can also stamp them with the wrong date, strip the only sequence that showed which frame followed which, and do it to the only copy. Renaming is a good servant and a poor first impulse. The mistakes are common because the tools make them easy.
Renaming the only copy first
The first mistake is touching names before a spare exists. A batch tool that is stopped halfway, pointed at the wrong folder, or given the wrong pattern can leave files half renamed or, worse, overwritten when two frames collapse to one name. If that folder was the only copy, the card has already been erased, and you have invented a loss. Copy first, confirm a sample opens, and rename the copy if you rename at all. Keep one set with the original camera names until you are sure the new names are right. Camera names are ugly. They are also a trail. Do not burn the trail and the bridge in the same afternoon.
Trusting the wrong clock
Batch tools often offer to use the date inside the photo. That date is only as right as the camera clock. A camera that was set to the wrong year will diligently stamp thousands of files with a fiction, and the fiction will sort beautifully. Spot-check the date against a picture you remember before you run the tool on the whole dump. If the clock was wrong, fix the pattern, or put the true date only in a folder note and leave the files in shot order. A wrong date that looks official is harder to detect later than a camera code you already distrusted. Date prefixes help only when the date is the one you mean.
Collapsing two different hours into one name
If the pattern is too coarse, such as the event name plus a short number the tool restarts, files from two cameras can land on the same name. The second save overwrites the first, or the tool appends a suffix you do not understand. Include a device word or keep each camera in its own folder until the names are unique. Overwrite prompts are the moment to cancel, not the moment to click yes to all because the progress bar is moving. A dump is large enough that you will not notice twenty missing frames by eye. The signs a memory card needed copying are about the card. This mistake is about what you do after the copy, when you feel safe and become careless.
Throwing away sequence when sequence is the story
Camera numbers tell you what happened next. A rename that sorts by a corrected date can be an improvement. A rename that sorts alphabetically by a caption you half-finished will scramble a ceremony into nonsense. If you are not ready to caption every file, do not rename every file. Rename the browsing set, which is smaller, and leave originals in shot order inside their folder. The browsing set is the album. The dump is the shoe box. Albums are where careful names pay off. Shoe boxes are where aggressive renames do harm. You can always name more files later. You cannot unmix a sequence you did not record.
Forgetting that names are not captions
A filename has room for a date and a few words. It does not have room for every person in a reunion photo. Cramming a sentence into thousands of names produces cut-off text and typos you replicate at scale. Put the sentence in a note or a caption, and keep the filename short. If the tool offers to write titles into the files themselves, test it on five photos and open them in a second program. Some tools strip other metadata while they add a title. Five photos are a cheap lesson. Five thousand are a weekend you cannot have back. Stop when the browsing set is clear. Leave the rest ugly and safe.
Frequently asked questions
Is it wrong to rename photos at all? No. It is wrong to rename the only copy, in one untested pattern, with a clock you have not checked. Rename a copy, in a folder, after a five-file test.
What if the tool already ran and the names look wrong? Stop. Do not run a second pattern on top. If the camera-named copy still exists, return to it. If it does not, make notes about the error before you try to repair anything, so you do not stack a new mistake on the first.
Should phone pictures and camera pictures share one pattern? They can share a date style and still need a device word if they might otherwise collide. Keep them in separate subfolders until you have seen that the names do not clash.