I keep things in dropbox, a copy goes in the cloud and to each computer/device connected. Might consider a usb drive if internet is a concern, have one on Moms laptop, she just has to plug in periodically and the software (Western Digital) backs up what isnt there or has changed. If using linux, look at setting up an rsync job up.
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To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault