WM V / AS F / MO V ▁containers . ▁Video ▁files ▁up ▁to ▁resolution ▁ 7 2 0 x 4 8 0 ▁are ▁n atively ▁supported ▁so ▁in ▁most ▁cases ▁converting ▁is ▁not ▁necessary . ▁▁ ▁Picture ▁formats : ▁J PG , ▁B MP , ▁P NG , ▁G IF ▁▁ ▁Other : ▁T XT ▁files ▁ ▁Operation ▁ ▁The ▁S amsung ▁R 0 ▁is ▁compatible ▁with ▁Microsoft ▁Windows , ▁Linux ▁and ▁Mac ▁OS ▁X ▁when ▁USB ▁mode ▁is ▁set ▁to ▁M SC ▁as ▁a ▁drag ▁and ▁drop ▁USB ▁mass ▁storage ▁device . ▁The ▁player ▁can ▁also ▁function ▁as ▁a ▁Windows ▁Media ▁ 1 0 ▁and ▁up ▁device ▁when ▁USB ▁mode ▁is ▁set ▁to ▁M TP . ▁Un like ▁many ▁S amsung ▁players , ▁the ▁R 0 ▁features ▁a ▁standard ▁micro U SB ▁conne ctor . ▁It ▁also ▁has ▁ 9 ▁physical ▁keys ▁( power / hold , ▁back , ▁menu , ▁user ▁button , ▁select , ▁up , ▁down , ▁left , ▁right ) ▁but ▁neither ▁hardware ▁hold ▁key ▁nor ▁dedicated ▁volume ▁buttons . ▁The ▁R 0 ▁only ▁powers ▁fully ▁off ▁after ▁several ▁hours ▁not ▁being ▁used ▁or ▁when ▁pressing ▁the ▁reset ▁hole . ▁The ▁rest ▁of ▁the ▁time ▁it ▁only ▁switch es ▁to ▁a ▁sleep ▁mode . ▁ ▁S amsung ▁claims ▁up ▁to ▁ 3 0 ▁hours ▁of ▁music ▁play back ▁( with ▁MP 3 ▁ 1 2 8 k bit / s ▁files , ▁volume ▁level ▁ 1 5 , ▁normal ▁sound ▁mode ▁and ▁display ▁off ) ▁and ▁