I try really hard not to back things up because I have proven to myself that I don't "run through" makeup quickly enough to really warrant it. For example, I have a backup of Sex Ray l/g from the Lure collection that is still BNIB. At one time I couldn't get enough of it, now not so much. Currently I only have backups of Mystery Kohl Power.
Feline Kohl Power Mystery Kohl Power Studio Lights Concealer in "Smoothspice" (I have 2 left out of 3) Beautyburst e/s x 3 (From the Barbie Loves Mac collection) Parrot e/s Sunny By Nature MSF