Free account allows 50GB. Can encrypt files/folders. Fast up and down!
This is frequently ISP-throttled (so slow for some), but it still just plain works. No piecing together parts, no server overloaded, no captchas, no learning how to say download in Czech… even when it’s throttled, just start downloading and step away for a while. The problem is if it’s throttled for the uploader, but even then, just don’t do it very often.