It's unlimited, so you can upload all the photos, videos, documents, PDFs, and PNGs that your heart desires, from your phone and your computer.
If you're looking for a long-term solution for photos and videos that you'll want to access from anywhere, unlimited is awfully appealing.
If that happens, you can either grumble about it and pay up - my personal favorite approach - or download your files to your computer and take them elsewhere.
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