Chifaniziro cha desiki la USB ndi mtundu wa fani yaying'ono yomwe imayendetsedwa ndi doko la USB, ndikupangitsa kuti ikhale yosavuta kugwiritsa ntchito ndi laputopu, kompyuta yapakompyuta, kapena chipangizo china chilichonse chokhala ndi doko la USB.Mafani awa adapangidwa kuti azikhala pa desiki kapena malo ena athyathyathya ndikupereka kamphepo koziziritsa kukhosi.Nthawi zambiri amakhala ndi mawonekedwe ophatikizika ndipo amatha kusinthidwa kuti azitha kuwongolera mpweya munjira inayake.Mitundu ina imaperekanso makonda osinthika, kotero mutha kuwongolera kuchuluka kwa mpweya.Mafani a desiki la USB ndi njira yabwino kwa anthu omwe amagwira ntchito pa desiki kwa nthawi yayitali kapena amafunika kuziziritsa m'malo otentha, chifukwa ndi osavuta kukhazikitsa ndikugwiritsa ntchito, ndipo safuna gwero lamagetsi lapadera.