It seems to be a joke, that I have to download my product-pictures from the Amazon Drive to my Computer and then have to upload it back to Amazon afterwards in my reviews.
Attachments: Up to 2 attachments (including images) can be used with a maximum of 512.0 KiB each and 1.0 MiB total.
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Reasons for not getting invited/reviewed for Amazon Drive REST API
Why would Amazon not allow the use of an external disk for the location of Amazon Drive ?
Maximum File Size of 129115298 bytes?
Looking to create a Roku app for Prime photos
Timeout when uploading certain JPEG files