I have a Vu+ Duo 4K SE and I'm thinking of getting a "Zgemma H7S 4K UHD 2x DVB-S2X + 1x DVB-C/T2 - LATEST VERSION V2 WITH REAR HDD SLOT", possibly two, for Management to use instead of her Humax HDR1100S boxes so a couple of questions:

How many concurrent satellite recordings is the box capable of?

If I decide to record to one of my Synology NAS boxes what happens if two (or more!) boxes record the same programme to it?

If I use an internal SSD HD to record to on the Zgemma can the recordings be accessed by the other box(es)?

Are there any 'issues' with the Zgemma at the moment?

Anything else I should know?