This microSDHC card is so incredibly fast that I let the Android system running on an old HTC Desire is essentially of the card (using the Supernova ROMS and DATA2SD) and was able to expand the much too small built space tidy. All applications run as fast as possible using the old smartphone, you realize at all that the system is not fully running on the internal memory, but in some cases is on the SD card. The error messages that not enough memory is available now finally belongs to the past.