Tresorit

Tresorit encrypts files and their metadata on your device before upload, which makes it a natural home for confidential paperwork. Version history is counted rather than timed: Personal Lite keeps 5 previous versions, Essential 10 and Pro 25. That is fine for a contract you save a few times, but a spreadsheet saved every hour can push the good version out within a day. Personal Lite is also limited to 50 GB and two devices, so most households will look at Essential, with 1 TB across 10 devices. The 14-day free trial asks for payment details up front, so set a reminder before it converts.