Will a Micro SD Card help? (problem with Galaxy S2 phone)

[macnab]

I have a Samsung Galaxy S2 phone, have had it 3 years now and although I'd like a newer one, I'm skint and can't afford an upgrade.

It keeps telling me that storage space is very low. It won't allow me to apply any updates. I use it for browsing and FB, the DCs use it to play Minecraft. I recently removed ALL photos/videos and messages (drastic!) and I used some techie key code to dump something or other (which I read about on youtube) that worked for about a week and now we're back to the storage messages and the phone overheating.

There's no store near me that I can take it into. But I notice inside there's a slot for a micro sd card. If I got one, would that make a difference? and if so, is there a particular type/size I should get?

It's doing my head in. HELP!