Question [Q] Swapping external with internal storage??

so my internal sd card is corrupted i guess.
the phone keeps freezing for 25 mins all the time.
after i gave up on trying to let it fix itself i got an idea,
i saw it's somehow possible to swap between internal & external sd cards.

is it possible?
is it a good idea to do so?

using galaxy s3 i9300 international
cyanogenmod 11 android 4.4.4