when i buy wd ultra 7 th generation portable drive it show me 90-100 MBPS speed via crystal disk and when i transferred data it showed 95 Mbps but after 20 days when i transferred data it shows me 75 mbps speed and benchmark also shows 75 MBps for various filed it differs up to 10 MBPs and i transfered iso fiels and it will also goes up to 70 MBPS
why this happening ?
why this happening ?