Microsoft’s cloud storage, tightly bundled with Windows + Office — OneDrive Basic gives 5 GB free per Microsoft account with cross-device sync, Personal Vault for sensitive files, and deep Windows/Office integration. Paid standalone 100 GB from ~$1.99/mo, or Microsoft 365 Personal from ~$6.99/mo for 1 TB + the Office desktop apps. The natural pick if you already live in Windows + Office.