Siemens Ltd, Sunbury-on-Thames, now has those 350Mb capacity versions of its MegaFile range of 5.25 Winchesters available: the company claims the drives – Model 4410 with ESDI extended small disk interface and 4420 for SCSI small computer interface offer a data transfer rate 50% faster than rivals – about 15Mbytes-per-second; no prices.