Expert on radio tech show the other day advised that the only way to ensure that your photos will last decades is to print them ( and I'm not so sure about that ).
Imagine trying today to look at photos stored on floppy discs. Computers don't have floppy drive and this Mac I'm on doesn't have a DVD drive. VHS tape is long gone and if you have any tapes, they probably don't play anymore.
There is no guarantee that the cloud
will exist even ten years from now, so before you put all your faith in Amazon, remember that even Blackberry just about went out of existence.
And, think about the software you've had to update to use a program and even then some files can't be opened.