MT4 Cache?

Hi,

Does anyone know if MT4 has a cache were it stores historical data? Does this need to be cleaned regularly I run about 28 charts so is all that data day in day out building up? Also, if you are aware please send me direction to locate folder to clear out.

Thanks.

find the deleted folder:
MT4 broker > deleted

the logs folder too, among others, build up/are unnecessary (depending on your preference)