Frankly a pair of 2TB SSDs will cost about £200 if you go for reliable and slow.
Back one up to the other every night, and when one fails or starts to fail, replace it and copy back from the other one.
Apart from one strange failure in a brand new SSD, I have had no issues whatsoever with mine.
F*ck 'the cloud'
I don't trust it with my data at all.