My module send a message not enough memory, despite I had 12% of free space

[Nick]

Hi!, I have a 2box D3, but when trying to drop new sound donwloaded from 2box page, it says, nos enough memory, but I checked and have free space 10% or more ... also some files can drop without problem and others not... anyone with this issue? thanks!
I have tried to move it to several files but nothing... "not enough space". BUT I HAVE SPACE!! maybe file is corrupted?

[welshsteve]

If you're on a Mac, and have deleted files while the DI3 is connected but not emptied the recycle bin before disconnecting, those deleted files will still be on the card, but under an invisible file called .thrashes. So they're still taking up disk space.

It could be that!