What is invisible backup??

•  I have the same question.  In your suggestions to remedy. I didn't see that you addressed  question. I don't use any cloud drives for storage . And I don't imagine that any photos, videos or any files,  downloads etc. That I may deem unnecessary or redundant. Would be labeled as invisible back ups. Can you please address specifically. What the term : invisible backup" is in reference to?    When I push the button to " select files". It merely takes me to the main " my files directory ". Which leaves one wondering what is " invisible backup" , considering it tells me about duplicates and the directly shows me those photos or video files, skipping any main file menus..  thank you for directly defining " invisible backups" for those of us with this quandry.

I believe invisible backup refers to the backups of original files after phot editing. So, when you open a photo in gallery and click the pencil icon to edit, the option to "revert" will be grayed out after you delete invisible backups. I was able to clear 6 GB of space after deleting invisible backups. I don't need the revert option on photos I've edited many months ago.

I just verified this.

I took a photo, edited it, and then deleted all invisible files (which it listed all the files in there after i clicked on it). I then went back to the gallery to try to revert that image and it was unable to.