Problem on backup camera roll from ios device to the stick

I’ve just finished the camera roll backup by using the app yesterday.  I managed the backup folder(put under a new created folder) in the stick and change the destination folder for the backup data manually on the backup after that. Problem happens! When I run the auto backup procedure, everything starts from the beginning! I have over 10000 files in my device and it starts from the 1st photo!! Is it normal? What should I do? Is it due to I moved the folder in the stick?  I hope somebody can help!! Thanks!

are you are moving the pictures after a backup? if so it no longer knows the pictures have been backed up. after setting the auto backup folder you should not move pictures to different folders.