▁of ▁pre - form atted ▁devices . ▁One ▁puts ▁the ▁file ▁system ▁( us ually ▁F AT 3 2 ) ▁directly ▁on ▁the ▁device ▁without ▁partition ing , ▁making ▁it ▁start ▁from ▁sector ▁ 0 ▁without ▁additional ▁boot ▁se ctors , ▁headers ▁or ▁partitions . ▁The ▁other ▁uses ▁a ▁D OS ▁partition ▁table ▁( and ▁MB R ▁code ), ▁with ▁one ▁partition ▁sp anning ▁the ▁entire ▁device . ▁This ▁partition ▁is ▁often ▁aligned ▁to ▁a ▁high ▁power ▁of ▁two ▁of ▁the ▁se ctors ▁( such ▁as ▁ 1 ▁or ▁ 2   MB ), ▁common ▁in ▁solid ▁state ▁drives ▁for ▁performance ▁and ▁dur ability . ▁Some ▁devices ▁with ▁embedded ▁storage ▁res emb ling ▁a ▁USB ▁mass - storage ▁device ▁( such ▁as ▁MP 3 ▁players ▁with ▁a ▁USB ▁port ) ▁will ▁report ▁a ▁dam aged ▁( or ▁missing ) ▁file ▁system ▁if ▁they ▁are ▁reform atted ▁with ▁a ▁different ▁file ▁system . ▁However , ▁most ▁default - partition ▁devices ▁may ▁be ▁re partition ed ▁( by ▁reducing ▁the ▁first ▁partition ▁and ▁file ▁system ) ▁with ▁additional ▁partitions . ▁Such ▁devices ▁will ▁use ▁the ▁first ▁partition ▁for ▁their ▁own ▁operations ; ▁after ▁connecting ▁to ▁the ▁host ▁system , ▁all ▁partitions ▁are ▁available . ▁ ▁Dev ices ▁connected ▁by ▁a ▁single ▁USB ▁port ▁may ▁function ▁as ▁multiple ▁USB ▁devices , ▁one ▁of ▁which ▁is ▁a ▁USB ▁mass - storage ▁device . ▁This ▁simpl ifies ▁distribution ▁and ▁access ▁to ▁drivers ▁and ▁documentation , ▁primarily ▁for ▁the ▁Microsoft ▁Windows ▁and ▁Mac ▁OS ▁X ▁operating ▁systems . ▁Such