dear experts maray pass external HD have WD waloon ki 8 month palay lii thee abi uss main eik masla hai jab bi uss ko computer say attach karta hoon i/o error ata hai or HD open nahi hoti agar iss ko complete format karoon too eik doo din kay liya chalti hai phir say i/o error aa jata hai(agar uss main data save karoon). so plz. iss ka solution day doo

thanks in advance