UPS recommendations (uninterrupted power supply) 1500VA / 900W

Hi,

I’m delving into the world of the UPS.

Equipment to be attached:

  • PC, monitor which draws roughly 350-450w load during normal use. 1950x TR and one 4gb Gpu.
  • NAS with 100w power supply.
  • Router

What is was wanting to know:

  • A UPS that’ll have 2 USB connections to safely shut down both the PC and NAS. (I can only find one). Is it a case were I could use a USB splitter to do this from the one USB port on the UPS.
  • 1500va/900w should be enough for the purpose?
  • I’ve heard there are ones that can actually save your work but again, I can’t find any.