I've been using OMV for maybe three years now. I have an RPi 3 hooked up to a 2TB external drive plugged into ethernet.
I've found it to be really unreliable from a view point of basic functionality. Whenever I try to connect to transfer files from or to the OMV Pi, I get all sorts of connection issues and have to re-boot OMV pretty much every time.
I've got it set up for NFS, AFP, FTP, Rsync - I've checked all the settings but most of the time it wont connect unless I reboot.
The latest issue is that it now thinks that all of the shares are read-only - a quick google of the problem reveals the usual confusion and head scratching that'll probably take me a week to get through.
On the other hand I've got a WD MyBook Live that I've had for seven years (it's fully backed up to CrashPlan!) that never gives me a problem.
Anyway....my question is....
On the basis that I use the OMV Pi for file NAS storage and for running Plex...is there an alternative that functions as reliably as a an off the shelf NAS that will also run Plex??