Most usb flash drives are FAT32 and will have limits on the root directory entries, depth limits of folders, and naming conventions.
Your next step is to explore which limit you ran into.
i am trying to copy photos to the flash drive,i can copy about twenty but i cannot copy more.
a warning window comes up saying cannot copy file******directory are file cannot be created,this is my own photos why cant i copy them.
i have used all different usb flash drives and the same problem exists.
it is allso the same on my laptop.
can you please help me this is driving me mad.