I just received 4,000 4GB flash drives for my company. When we try to access video or PDF files that we've written to a folder the folder comes up empty.
For instance, on every drive we load a PDF and a folder with videos about our company. After copying over all the files, which says is successful, the folder is somehow empty. I don't see them with showing hidden files or through the command prompt or anything.
We have tried formatting them with exFat, NTFS and of course FAT32. We've tried to load the files on there manually on a computer or clone from a different flash drive on the duplicator. We've tried not putting the videos in a folder, but that didn't make a difference.
It seems that small files will sometimes stay but nothing very large will. Large files will disappear.