Originally Posted By: TeacherRO
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I'm looking into google photos to back up my phone photos...

I use Flickr (1Tb) for that. Here's a writeup on that:
http://iphonephotographyschool.com/flickr-app/

One tool for backing up photos that seems quite ambitious is PicBackMan: http://www.picbackman.com/
for Android/iPhone/Windows/Mac - works with Google Photos/Picasa, Flickr, OneDrive, DropBox, Instagram, Photobucket, etc.

I haven't used it myself, though.
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A signal mirror should backup a radio distress signal, like a 406 MHz PLB (ACR PLB) (Ocean Signal PLB)