Sometimes, copying files from the PC to a shared USB disk (via SMB), this error was returned ""Destination Folder Access Denied" "You need permission to perform this action". The strange thing is...

What are the differences between the M7000 and M7200? Looking around is not clear. In addition there is also a model M7010. I don't know which one to buy.

By connecting an external hdd to the usb port and enabling sharing, the hdd is configured and opening it in the LAN I can find a share called "G". In the settings, in USB appears under "partition"...