Adds an article about Amazon Photos transfer, which was requested on portmap site

articles/photos8.md

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+---
+title: Amazon Photos
+datatype: Photos
+sources: ["Amazon Photos"]
+destinations: ["Download myself"]
+---
+
+# Amazon Photos
+
+Amazon's [photo storage service](https://www.amazon.com/Amazon-Photos) boasts unlimited photo storage for Prime members.
+Over time this can of course result in more photos in the cloud than a user can easily transfer to another 
+service.  
+
+
+The only option today for moving photos from Amazon to a different service is to begin by downloading, and hope that
+uploading to another service goes well.  Some users may have challenges with storage or bandwidth.  Photos can easily
+be 2MB each, requiring a GB of storage for each 500 photos.  It's worth using specific bulk export tools rather than 
+using the regular Web page interface for photos, because bulk export tools have been desgined to require less
+back-and-forth and complete more reliably. 
+
+Amazon support [recommends using Amazon Drive](
+https://www.amazonforum.com/s/question/0D54P00008Lj1oaSAB/how-to-download-all-prime-photos-to-external-hard-drive)
+as the interface through which to download photos.  A [3rd party article suggests using the Photos interface](
+https://robots.net/tech/how-to-transfer-photos-from-amazon-photos-to-external-hard-drive/) directly.  In either
+case, it does not seem possible to do a single bulk download/export of photos, and instead the user must
+select multiple files and photos and hope to select and download them all eventually using some methodical process.
+
+## Further information
+
+This article would be improved with some more information about what the export looks like and whether metadata
+is completely lost.  [Contributions welcome](https://github.com/dtinit/portability-articles)!