Not enough space for time machine...
Who has a hard disk in this size, please contact me. 🙂
MacBook Pro with Retina display, macOS High Sierra (10.13.6), null
The fun of High Sierra..
I think it might be a while before 1PB drives become available.
We only have 10 or 12TB readily available now.. so only another 990TB to go..
For your situation you will need 8 of them.. This may cost a fair bit at current capacity and prices..
In fact I doubt you can afford the electricity to run them let alone the capital cost bill.
Clearly your current target is severely lacking with only 217GB of space available.
Try out Carbon Copy Cloner.. much more reliable.