If you are an Amazon Prime member, then you can start enjoying a new service: unlimited photo storage with no extra cost. This new services shows how competitive the online storage service has become and how hard companies are trying to keep their loyal customers, especially the big three: Amazon, Google and Microsoft.
Google Photo uses Google Drive space (15 GB) to auto-backup and store all photos and video of yours, and if your photo is smaller than 2048 x 2048, then it will NOT use your Google Drive space. In another word, if all your photos are smaller than 2048 x 2048, then you actually get unlimited photo storage.
Microsoft OneDrive comes with 7 GB free storage space, but recently Microsoft announced that any customer who installs OneDrive on mobile phone AND enables photo auto-backup feature, then they will get 15 GB extra free storage space, which makes the total free storage to be 22 GB.
Now Amazon responded with a bold move and brought a sweet treat to its Prime members: every Prime member gets unlimited photo storage, period. This is only available to Prime members, non-Prime members still have the original 5 GB free space.
If you have Amazon Cloud Drive on your mobile, then you will see a notice like this when you launch it:
If you are a photographer, then you should really try Amazon Prime ($99/year) so you can get all your professional photos backed up in Amazon Cloud safe and sound with no extra cost.