PS Vita - Where to put 4GB memory card?

[VG Docs]

For those of you who don't know, a PS Vita memory card is minuscule in size, here's an example of its size. Poor example, I know but it's the best one I could find.

I'm getting an 8GB memory card soon from Amazon so I can play Borderlands 2. I was an idiot for buying the digital version... but it is what it is.

That means, that I'll always have one memory card in for games (8GB), and another memory card (4GB) for... idk yet.

 

Where could I store it so it'll be safe yet in a place where I could find it easily? Any ideas?

 

Also, I'm not sure what to put on the 4GB card since I wasn't preparing for this... any ideas for that?

[Clyne]

Small plastic baggie where you put in your ps vita bag.

[79wjd]

ugh, god damned sony and its proprietary memory cards...

 

is there room in the battery compartment? 

[shadowblitz3]

I kept my cards on the vita game box