If you are having problems getting the Lg Optimus One while inserting the SD Card, these are the steps you have to follow to get it fixed:
Switch on the phone, then remove the SD card.
Switch the phone of, insert the SD card.
Reboot into recovery mode by pressing and holding Home button+Volume button down+On button
Go into storage and mountage.
Press mount SD card and make sure it says "unmount" after you have done it.
Go back and reboot the phone.
Tips, it helps if you reboot the phone throw Recovery Mode.
Just thought I would share this, sorry for starting a new thread but I think it might be useful to some people
Switch on the phone, then remove the SD card.
Switch the phone of, insert the SD card.
Reboot into recovery mode by pressing and holding Home button+Volume button down+On button
Go into storage and mountage.
Press mount SD card and make sure it says "unmount" after you have done it.
Go back and reboot the phone.
Tips, it helps if you reboot the phone throw Recovery Mode.
Just thought I would share this, sorry for starting a new thread but I think it might be useful to some people