This application allows you to make more powerful the using of SD Card. This is changing a parameter in a file system (thus the need of Root access) that manages the size of the cache on the memory card. By default, this value is set to 128 (kb) but it was found that changing this value in 2048 (kb), the performances are optimized, making read-write on our external memory faster. Many thanks to brainmaster, XDA Member that discover this. Note that if you reboot/turn off your device, you lose the setting that you did, so you can click on the dedicated box to allow this app to set on every boot the value that you choose.
This function may be not work.