Impossible to copy offlinemaps from the mapsfiles

[nostra18]

Hello,

I'm using the V10.1.3 GP
I downloaded a custom offline map on Oruxmaps, and i used to copy directly on my computer the files to send them to my backup phone.
But when i try to copy, move, compress or anything else the OruxMapsImages.db, i got errors depending of the way i tried. Sometimes it's "unknown error" "you don't have the rights"...
Is there any easy solution to do it ? I didn't have the problem on previous versions

Thanks !