Dropbox

Dropbox is still the benchmark for sync that stays out of the way, and unlike Google Drive it offers an official desktop app for Linux. Plus gives one person 2 TB. The number to weigh is version history: Basic, Plus and Family keep 30 days, while Essentials and the business tiers keep 180, which is the difference between recovering a spreadsheet you overwrote last week and one you overwrote last quarter. The free Basic plan is a trial rather than a home for your files: 2 GB, and only three devices signed in at once, phones included. Dropbox is the pick for a mixed set of computers that need dependable sync; pay for the longer history if you rely on it for recovery.