Robert is right

Robert E A Harvey is quite correct (and lots of examples too).

If your data is *important* to you and you really need to be able to have access to it at a time of your choosing, then store it on an external drive and carry it with you. An 8GB micro-SD card and a USB adapter can be yours for less than £20 on e-bay and these things are really small. (Yes I did buy one and it does work).

I also have 500GB of network hard drive connected to my home router and the instruction manual says I can set it up for FTP services (though I haven't bothered trying that). If you NEED access to your data, you HAVE to be in control of where it resides and how it is accessed. Equipment and services always fall over at some time, so plan for that.