I've got a NOOK Color with a dual-boot SD card which lets me run CM7 (off the SD card) or the standard NOOK OS off the internal memory. I've been running it since March. It has gradually gotten slower and slower and more and more unstable until a few days ago it finally got to the point where it pretty much became unusable - freezing when trying to connect to WiFi, screen becoming unresponsive, couldn't wake from sleep, mysterious battery drain, updated apps saying they still needed updating, lots of "not responding - force close?" messages, etc. I figured that either something in the OS had become corrupted or I had installed an app that wasn't completely compatible. I finally decided to wipe the SD card and start over. So now it's up and running again, and I'm very happy with it - it's faster and more responsive than I had remembered. I've installed what I consider my "necessary" apps. What I would like to do now is somehow make a "snapshot" of the SD card the way it is now, so that if I have problems in the future, I can just go back to that point. I've got Titanium Backup installed, but I don't know if that will really accomplish what I'm after. Can I just copy the backup folder to my computer and save it there in case I need it again? Does TB backup all the OS stuff as well as the apps and their data? Thanks for your help - sorry to be such a noob!