I need to know how much 128 mb is because I just got this keyboard and it needs more memory so I can record adio tracks and the memory stick cost 50 dallars I need to know how much 128 mb is so ill know if I need to get more than that

About 1/8th Gig. Sounds expensive. You can get a couple of gig. I would do a search on Ebay, and see if they are resonable? Try this:
eBay – memory stick, sony memory stick and memory stick duo items on eBay.com. (http://buy.ebay.com/memory-stick)

So you want to buy a 128mb memory stick? They are very cheap these days, I would say you can get one for less than a pound

Trevordog, how can you disagree an answer because of currency?

Trevordog, how can you disagree an answer because of currency?
Because I don't know how much a pound is omg we use dallars bills coins

So you are not bright enough to find out? Thanks NeedKarma

For recording your looking at about 1gb of ram! I know it sounds a lot but it doesn't cost as much as you think,

Agreed though, 50 dollars for a 128 MB memory stick is way overpriced, it's like the store near me that is still trying to sell old 32MB video cards for 70 dollars.

For 50 bucks you should be able to get a 1 GB or maybe even 2 GB flash memory stick, what type of memory card does this thing use?