Using sudo mkfs.ntfs -f -L data /dev/sdx3 and sudo mkfs.vfat -n data /dev/sdx3
I can format the third partition.
It is then accessible in Disks but it is not accessible in Windows.
With 20.04 the third partition was accessible in Windows after such formatting.
I have not tested if It can be formatted ext4 an labeled "writable yet.
Using sudo mkfs.ntfs -f -L data /dev/sdx3 and sudo mkfs.vfat -n data /dev/sdx3
I can format the third partition.
It is then accessible in Disks but it is not accessible in Windows.
With 20.04 the third partition was accessible in Windows after such formatting.
I have not tested if It can be formatted ext4 an labeled "writable yet.