Personal data whats???
----- RAW Images
----- Master Jpegs
----- Customer X
Additional to this i make it a habit of making backups of these images at least once per month. A more active or professional may do this weekly. Creating copies on two DVDs.
After these discs have been created i check them and remove the files from the PC. Mostly to maintain free room for data as well as keeping things organized.
Keep one disc for usage and another for a true backup. Discs can be scratched a i have found out =( Plus they are not that expensive anymore.
I realize this can be a bit pedantic, but the benefits can be immense.
Take for example DT's minor outage of pending images.
All images needed to be re-uploaded.
Sometimes accidents happen, and if you are in the business of selling you work (you wouldn't be reading this or on this site if you didn't) accidents can prove costly.
A client may loose a submission or a commissioned piece of work. Or the issue can be in your own backyard. A hard drive may fail, virus may force a pc refresh, or heaven forbid theft can occur.
Backing up your work can be a bit time consuming but with it integrated into your work flow, can drastically improve your output.
Not to mention that you can still re-style the image from the original, not for a copy of a copy, causing loss of detail.
I have personally been saved a few times with this process. By having easy to find data, I have been able to replace 'lost in transit' data, as well as survived a few hard drive and PC crashes.
I hope you never loose any data, but if it does happen, i hope you have it organized. Because its hard to get your customers but very easy to loose them.