Uploadingit is another file sharing and syncing service that I found. It has free and fee-based plans, allowing you to upload, sync, and share files.
The file manager works like a desktop app and is simple to use. You can upload multiple files at once, drag and drop, move, rename, and organize files and folders.
The free plan offers 10GB of space and 10GB of daily bandwidth. It does have a 200MB max file size limit and advertisements, but it's free. You can upgrade to paid plans to increase disk space, bandwidth, get rid of ads, ability to hotlink files, and also increase your priority download.
It is another, free file syncing and sharing service that is very useful for teachers and students.