I've done that and something goes wrong I think.
Once again, the icon that we can see on my last screenshots have disapeared after these command lines were executed.
Thanks again for everything.
debian:~$ sudo mkfs.ext4 /dev/vdb1
mke2fs 1.44.5 (15-Dec-2018)
/dev/vdb1 contains a ext4 file system
last mounted on Sat Mar 20 10:34:17 2021
Proceed anyway? (y,N) y
Creating filesystem with 26214144 4k blocks and 6553600 inodes
Filesystem UUID: 937ebb78-35c0-4700-9af4-c777fd5aa6a8
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872
Allocating group tables: done
Writing inode tables: done
Creating journal (131072 blocks): done
Writing superblocks and filesystem accounting information: done
debian:~$ sudo mkdir /mnt/storage
debian:~$ sudo mount /dev/vdb1 /mnt/storage
Once again, the icon that we can see on my last screenshots have disapeared after these command lines were executed.
Thanks again for everything.