Galaxy S3 stuck on Samsung logo, is there anyway i can backup my data in recovery mode without rooting? i have the original Firmware, no rooting. Recently, i got this issue where my s3 doesn't startup, it just keeps flashing the logo over and over again until the battery drains. I've already tried pulling the battery, wiping cache partition several times but no luck.

So is it possible to root my device without losing any data or at least can i backup from the recovery mode?

I'm an Android newbie, so i have zero background on this stuff. What am i suppose to do ?

Edit: i'm specifically asking about backing up my data, is it possible?
Boot into odin mode, plug into laptop,  get custom recovery and root via odin (this doesn't wipe data) then in the custom recovery do a nandroid backup then clear dalvik cache and try to boot. If this doesn't work then sorry you're gonna need to flash a custom rom or stock rom again