Motorola decided to name the mount point for the internal app memory /sdcard
The actual sdcard is mounted as /sd-ext
So /sdcard means Internal Device Memory, /sd-ext means the actual sd card itself.
Confusing, isn't it?
When I connect my Bionic to my PC (Windows 7) the internal card says "MOT" while the external card (SD-EXT) says "Removable Disk." At least it did until I changed from the 16GB card and replaced it with a 32GB card. I let the phone format it. Now both drives show up as "MOT." Fortunately it's easy to figure out which is which. Now if you're using a file manager app like
Astro, it says /sdcard and /sdcard-ext, but if you're using the native File Manager (called "Files"), it says "Internal phone storage" and "SD card." Yes, extremely confusing.
And for those who haven't done this before, this is what I did to go to .902 (I'm going to wait for the OTA on .905, no real reason, just willing to wait). Be sure that "USB Debugging" is enabled.
1. Plug phone into computer.
2. Press "Mass USB Storage" from the list of choices. Two drives will show up. One is MOT (Internal Storage) and the other is Removable Drive (SD-EXT).
3. Put the downloaded file in the root (ie main area) of SD-EXT (not Internal Storage). No need to change the name or extract it.
4. Eject both MOT and Removable Drive and disconnect the phone from your computer.
5. Power phone down
6. Reboot into stock recovery (adb reboot recovery) by holding Power and Volume Up/Down at the same time.
7. Select "Recovery" by pressing Volume Down, then press Volume Up to initiate it.
8. When the robot appears, press both volume keys in at the same time.
9. Select “apply update from sdcard” using the volume keys, then Power to initiate it.
10. Using the Volume keys, choose the file that you downloaded (above), press Power and let it load.
11. When the install is done, press Power. It'll reboot, but it'll be longer than normal (about 6 minutes)
The whole process, from moving the file into the SD-EXT card to phone rebooted takes about 10 minutes. Of that, 3 minutes will be the phone extracting the files (Step 10) and 6 minutes for the install itself (Step 11). A long time to stare at your phone, I admit.
