I've installed fvdw-sl firmware version 18-2 without any problems and built a RAID1 with the two disks.
I can confirm that NetworkSpaceMax support 4 TB disk (WD Red Plus) without uboot update.
I'would like to perform some speed test and I've tried to switch to samba 4 but the setting is always reverted to 3.x after the commit.
Is Samba 4.x an addon ? (by the way I've already make a donation).
I would like to know is there is any form of quota support on shares (macOS TimeMachine backups need to be limited otherwise eat all the space).
Thank you.