Going on from my Full wipe thread I was wondering what a Wipe data/Factory reset actually deletes from the device? I would imagine it deletes /data, but does it remove anything else? Does it clear the root (/) filesystem full stop, or a select few folders? I would also imagine that flashing a ROM would at least remove the /system folder and possibly a few others in the root prior to installation? So this leaves potentially lots of untouched folders that will remain lurking indefinitely. What is safe to remove? For example, on my root partition I have the following folders: acct app-cache cache (gets wiped in a Wipe Cache process) config customkernel d data (wiped in factory reset? The dalvik-cache folder is stored within here) dbdata dev efs (very important!!!) etc (symbolic link to /system/etc) lib misc mnt proc res sbin sys system tmp vendor as well as a few files (build.prop and a few *.rc files) And as for the /sdcard partition, I have LOADS of folders that remain untouched by a factory reset. Does the *# method wipe any these, or any other folders in the root filesystem that a factory reset does not? I think most of these have been lurking around since day 1 and probably a good few could be removed. Does anyone know what gets wiped during a clear data/factory reset/ROM install? What is safe/unsafe to remove from the / and /sdcard partitions?