I’ve been using Dropbox for several months now, and I still like it. I have it installed on two computers, a desktop and a laptop. I recently wiped the desktop’s hard drive and installed an entirety new drive and system, then I installed Dropbox, and all my files (which were stored on Dropbox) mysteriously appeared on the new installation. Not really quickly but not a lot slower than if I had used some kind of backup system, and with zero effort.
Dropbox is an off-site backup and sync program. You install the app and link it to an account (which is free for smaller amounts, a reasonable cost for larger amounts). Your “Dropbox” is a folder in which you can have subfolders. In theory, you can put your entire personal set of folders inside your Dropbox folder. Anything that goes into that folder gets backed up on the web, and if you have a Dropbox on two computers or more, it gets synced across the computers.
I tend to download stuff onto my desktop, and when I make a new file (say, something I’m writing) I tend to put it on my desktop as well. Then, on a regular basis, I move those items into trash, a ‘scratch’ folder I maintain on my desktop (which means “Probably throw out”), or into the appropriate Dropbox folder. Then, it does not matter if I’m using the desktop or the laptop, everything is in the same exact place.
One has to decide if you want the Dropbox main folder to be on your desktop or in some other location in your home directory (or My Documents or wherever). I have no advice here. On my laptop, it is in my home folder on my desk top computer, it is on my desktop. Both work, both have advantages and disadvantages.
The folders and files that you have in Dropbox are also available from a web page, so you can access your files as long as you can access the web, and now there are a number of mobile apps for android and iWhatever that integrate with Dropbox as well, none of which I’ve used.