I used to have a problem keeping my PAF data synchronized across multiple computers. Now I can do work on any of my computers and the changes are automatically made to all of them.
Dropbox.com offers 2 GB of free online storage, as does various other sites. The difference is that you can install Dropbox on multiple computers and Dropbox automatically synchronizes your data on each computer when that computer connects to the internet.
I have PAF installed on each of my computers, with my PAF data file (and linked photos) uploaded to Dropbox, which also stores a copy in my local DropBox folder. The rest is automatic. When I start PAF on any of my computers, it opens the file stored on the local computer and this folder is automatically synched across all of my dropbox folders.
So I can edit a PAF file on my laptop while doing research at a remote location and any changes will automatically be made my desktop computer, my wife's computer, and to all of the other Dropbox folders keyed to my email address and password (whether on a Windows PC, Mac, Linux, Android phone, or iPhone).
So I just use PAF as usual. There is nothing new to learn or do, but before shutting down the computer I check my Dropbox icon in the system tray to make sure that my PAF data file has a checkmark on it (showing it has been synched to my Dropbox "cloud" account). People with a faster internet connection probably don't need to bother with that step.
I should never lose my data again or end up with multiple different versions of the same file. Dropbox also has other useful features.
Disclosure: I have no connection to Dropbox.com, except as a happy user of their free account.