A "folder" in Gallery is the last folder name in the chain, so if a picture file is in /DCIM/Calendar/Holidays/Easter, the folder name in Gallery is Easter. You can also have a folder on the phone in /DCIM/Camera/Easter. That will be another folder in Gallery called Easter. But it'd a different folder.
Which is why you should use a file manager to copy (never Move*) files - you can see what's actually happening. Doing that, you may find that the file you've been trying to move actually does already exist in the folder you're trying to m ove it to (or that somehow, the reverse of the above happened, and you have 2 "folders" in Gallery, with different names, both referring to the same folder on the phone). You should have My Files on a Samsung phone - that will work.
*If a Move blows in the middle, you can lose both the source and the destination. The file is still there, it never gets "moved" - Linux (Android runs in Linux) just renames a file from, say, /DCIM/Camera/Folder1/File1.jpg to /DCIM/Camera/Folder2/File1.jpg. The directory listing gets changed. If Linux reads the old directory listing, deletes it ... then something goes wrong, there's no way to "link" that file (get it listed in a directory). If you copy a file, Linux actually reads the file (either all at once or, if there's not enough RAM, one piece at a time) and writes it to the new location. Once you see that the "moved" file is good, you can delete the original. If the moved one is bad, delete it and copy again.
10-21-2018 01:58 PM