▁drivers ▁are ▁required ▁to ▁make ▁full ▁use ▁of ▁the ▁device , ▁usually ▁because ▁it ▁does ▁not ▁fit ▁a ▁standard ▁USB ▁class ▁or ▁has ▁additional ▁functionality . ▁An ▁embedded ▁USB ▁mass - storage ▁device ▁makes ▁it ▁possible ▁to ▁install ▁additional ▁drivers ▁without ▁CD - ROM ▁dis ks , ▁flo pp ies ▁or ▁Internet ▁access ▁to ▁a ▁vendor ▁website ; ▁this ▁is ▁important , ▁since ▁many ▁modern ▁systems ▁are ▁supplied ▁without ▁optical ▁or ▁flo ppy ▁drives . ▁Internet ▁access ▁may ▁be ▁un available ▁because ▁the ▁device ▁provides ▁network ▁access ▁( wire less , ▁G SM ▁or ▁E ther net ▁cards ). ▁The ▁embedded ▁USB ▁mass ▁storage ▁is ▁usually ▁made ▁perman ently ▁read - only ▁by ▁the ▁vendor , ▁prevent ing ▁accident al ▁cor ruption ▁and ▁use ▁for ▁other ▁purposes ▁( although ▁it ▁may ▁be ▁updated ▁with ▁propriet ary ▁protocol s ▁when ▁performing ▁a ▁firm ware ▁upgrade ). ▁Adv antages ▁of ▁this ▁method ▁of ▁distribution ▁are ▁lower ▁cost , ▁simplified ▁installation ▁and ▁ens uring ▁driver ▁port ability . ▁ ▁Design ▁ ▁Some ▁advanced ▁hard ▁disk ▁drive ▁commands , ▁such ▁as ▁Tag ged ▁Command ▁Que uing ▁and ▁Native ▁Command ▁Que uing ▁( which ▁may ▁increase ▁performance ), ▁A TA ▁Sec ure ▁Er ase ▁( which ▁allows ▁all ▁data ▁on ▁the ▁drive ▁to ▁be ▁secure ly ▁er ased ) ▁and ▁S . M . A . R . T . ▁( access ing ▁indic ators ▁of ▁drive ▁reli ability ) ▁exist ▁as ▁extensions ▁to ▁low - level ▁drive ▁command ▁sets ▁such ▁as ▁SC SI , ▁A TA ▁and