So what is a SD storage flip-flop? Basically what this mod does is switch SD storage to internal storage, or internal storage to SD storage. Why is this beneficial? Well, on the Droid X2 in its stock form, your actual SD card (the one you put in the phone by hand) is not mounted in the "correct" file system space by default. This screws a lot of things up e.g. trying to install a Gameloft game which ends up installing on the internal MMC, or general system files getting stored on the internal MMC. This mod fixes that issue and puts everything on your actual SD card like usual. Technically, the internal MMC is faster to access than your SD card, so it makes sense why Motorola made it this way, but from a user standpoint it doesn't make much sense, at least, to me.
This can be flashed in BSR recovery. To check if it works, look at your SD storage menu in your Settings. If they flip after flashing the ZIP, it works.
WARNING: This will switch your SD card configuration. Your SD Storage will become your Internal Storage if you flash the zip. You can return to a "normal" configuration by flashing the second links. If you do a factory data reset, REMEMBER that your SD card configuration has been flipped, since there are check boxes allowing you to format your SD card / internal storage - Choose the right one! Also, there are general BLUR application settings that might need to be changed e.g. Blur Camera storage area. Just remember that the storage terminology will be flipped.
SD storage 2 internal storage
Install this to make your SD card mount in the "right" place
Internal storage 2 SD storage
Install this to return to a "like stock" configuration.