Error 0 + error Iso

[AndyPC]

Hello everyone,
I'm trying to load an iso image (linux mint 2.9GB) into the ISO Images folder under local.
I see it reach around 37% and then start again (see attached "error").
He does it two or three times, the percentages change every time, and then I get the error.

I also tried to create a directory under another space created in RAID, but when choosing the disk it tells me "no disks unused", when in fact I have some (see attached "nodisks").

I just installed Proxmox and everything went fine, I don't understand how I have it already full of errors.

Any suggestions?
Thanks for help

 

[AndyPC]

I solved the ISO error by giving it the full path to the Ubuntu site.
For the other "no disk" error, I don't know