Hi all,
I've successfully installed OMV 4.x on my old QNAP TS-210.
I've tried to install Debian to an external USB 2.0 pen, but It was painfully slow.
I made a new installation on the first internal HDD, a 10Gb partition is enough.
Installing OMV is just a matter of following the tutorial on this forum.
It works fine.
As for transfer speeds, they're not the fastest, but it's mostly like the original firmware - write 16Mb/s, read 20Mb/s.