Swap External memory to internal

[dev123]

How to swap External memory to internal memory on Xperia M and what are the risks...?

[Uliwooly]

You can't do so 

[dev123]

Why can't I..?

[Uliwooly]

Check the XDA forum

[goelaakash90]

you can.

only if your phone is rooted.

[dev123]

How do I root my phone.Can you explain the steps..

[goelaakash90]

http://forum.xda-developers.com/xperia-m/general/towel-root-steps-to-root-t2789990

But before you proceed, remember that rooting has some risks.

However, if done properly, it wont be a problem.

I have rooted my phone (using the above guide) and it works perfectly.