I have been using Dropbox (dropbox.com) for years and I love it. Dropbox is software that syncs your files online and across your computers. You put your files into your Dropbox on one computer, and they’ll be instantly available on any of your other computers (home, work, etc.) that you’ve installed Dropbox on. You can even access Dropbox from your mobile device or from an un-registered computer by going to the Dropbox website.

Here’s how it works: If you’re editing a document at home and you save it to your Dropbox, it will automatically sync the file to all your other computers as if you saved the document to all of your computers. I used to use thumbdrives to copy files I’m working on to the thumbdrive and carry it with me. In addition to current files I’m working on, I also put into Dropbox several reference files that I may need to access from other computers.

You can also share files with others by putting them in a shared folder or photo album. You can then send people links to specific files within your Dropbox.

Files you put into your Dropbox folder are automatically backed up to their servers. Therefore, if your computer crashes, you can restore the files. (I don’t recommend this as a substitute for a serious backup of your computer, like using Carbonite.) Dropbox also keeps a history of every version of the files, so you can undo any mistakes or even undelete files. They keep a 30-day history of your files.

Their 2GB account is free–which lets me sync plenty of files that I may need across my home and work computers. They offer larger accounts for $10 or $20/month. Dropbox works on Windows, Mac, and Linux.

No more e-mailing file attachments to yourself or carrying around a thumb drive! This has simplified my life, and that’s what I expect from technology.