Amazon Cloud Drive: $12/yr for Unlimited Photo Storage [Free for Prime members]

If you are a fan of cloud backups and backups-of-backups and backups-of-backups-of-backups (and so forth), Amazon is now selling Unlimited Photo storage for $12 per year for non-Prime members. Prime members get this feature for FREE as part of their Prime membership. If you are not a Prime member, you get a free 3-month trial of this service. It includes unlimited photo storage plus 5GB of any other file types (videos, documents, etc, your choice).

If you want to store a lot of other data (not just photos), they have a $60/year Unlimited Cloud Storage plan. Everyone has to pay for this plan, Prime members too. This plan too comes with a free 3-month trial membership.

You can upload your photos using the Desktop (PC or Mac) Cloud Drive app or the mobile apps (iOS, Android, Fire Android) or use the browser-based Cloud Drive navigation (eg Drag and Drop or use File Explorer on Windows). [updated]

This is an automatic renewal subscription service, so it will keep renewing unless you manually cancel it on your Amazon account. It requires a credit card (no debit/gift-cards) for the payment plans.

Clarification #1: this general Cloud Drive offer should not be confused with the Fire Phone promotion that gets you unlimited photo storage for photos taken with the Fire Phone (which is not linked to a Prime membership, but includes a 1yr Prime membership upon purchase).

Clarification #2: Digital Music you purchase from Amazon (or is included with a CD/vinyl purchase) is stored in your Amazon locker but does not count against your 5GB Cloud Drive storage. The 5GB is for anything you upload on your own.