Opensuse 13.2

So weird. I have some music files that I am working on in a directory on sda2 and after I mess with them, using Dolphin split window, I click and drag them to a USB drive.

Sometimes the copy will fail and say.

Could not write to /run/media/hexdump/staples/some folder name.......(The folder name is a really really long name with embedded spaces. I tried just copying the individual files and that also failed.

The folder name gets written but I get the error when it tries to copy the files.

The odd thing is that I can copy other folders, or copy the folder in question to another location on sda2.

Very confusing.

Can you help ?