just save it using TB.. when u install on a new phone put back the backup file and restore

phone need to be rooted to use TB

If you know where is the save file, you can also backup yourself. Google for the savefile location.

no idea. I sold the phone. Now on nexus 

You mean nexus? What I can say is... My first charge, 100% to 7% before I charge it, it went through 4hours 11mins screen on time. The GPS in this can totally throw W in shame. With W, even with AGPS sometimes I take 1minute to lock or even won't lock at all(got signal, just die die don't want lock). This one... Data off, GPS alone can easily beat W. The battery life of this one is better than W too IMO. Not sure on data yet coz I'm at home, most of the time use wifi. Played games, download, updates etc... 4hours screen on, I never get such long on W. 

Nexus?? Or W? If W I believe. Nexus not sure yet. On standby, W should be the winner. But on usage I think nexus uses less battery.

W battery drain very fast. 

Wifi consumes a lot less.
On standby, wifi around 1% per hour, data 3% That means on data, even if you don't touch it, it'll only last a day.

Seriously? Me on wifi sleep 8 hours from full to 92~93% at most. On W I mean. Nexus not sure yet. Only second day on nexus

Yeap, full time on.

just out of sudden, my phone keep restarting itself continuously for no reason.
after it restart, it hang for few second and restart again then I press the off button to shut down whole phone.
10mins later, I on it back and everything okay.

anyone encounter this?

There us setting for storage in the camera.

If you already rooted the phone and have done the memory swap (turn the external into internal), then the storage setting in the phone should be set to PHONE. If your phone is standard, then choose memory card for storage in camera setting.

I guess so. never tried with games, but with other apps it work fine.

IMO no harm in rooting. I did it because my paid apps confused with 3 layer memory that SGW have and can only move the data files into internal usb memory. I'm not into experimenting with those ROMs.

Easier than I thought. This is my 1st time too (rooting android).

I was sked too. Coz last time I kinda soft bricked (I think) my SE xperia x10i when updating (not rooting) to latest firmware. Have to forked out rm20 to 'unbricked' it. It's all up to you. After the memory swap, I quite satisfy with the phone performance even with standard rom. I don't see any need for me to install custom rom.

No