NEW M'soft 365??? I and my family have been using it for several years, very successfully.
What do you use instead of Office?
In my Fractal tower, I have room for EIGHT 3.5inch drives..I use ONE as a 1TB back-up drive'
There is space behind the motherboard for two SSDs, I use ONE, a Samsung 1TB partitioned into 250GB as C, system drive, and D = Data Drive, which is designated as my One Drive so automatically uploads to the Cloud when anything is changed. I use the same system on another PC, and my Laptop, and One Drive on my phone, so all data is immediately available on any device. Works a treat.