hi hope i'm in the right page I have a flash drive and sometimes it works and sometimes it dont do u know why
you may just have a faulty flash drive or its contacts are dirty.
give the drive usb connection a brush out with a dry clean paint brush to remove any dust and dirt build up.
hi dont think its dirty it works on all the outher coumpers in the house even one thats 3000000 years old
then it maybe a fault usb port hub on your computer.
give he ports a clean as above.
also try updating your motherboard drivers for your machine.