It depends on how you’re going to use the storage.
If you’re just looking for a place to keep a handful of photos, documents, or a few small projects, the free tier (5 GB) is usually enough.
If you have a lot of accounts, large media files, or you want to keep a lot of data for long‑term backup, you’ll need a paid tier. The paid plans start at 50 GB and go up to 2 TB, and you can always add more storage later if you need it.