My book essential 3tb not opening

my computer reads my hard drive but wont open it up as mass storage or anything. i go to devices and printers and its there. so everything i have on it i cant get to. its not only my computer but any computer i hook it up to. it reads just cant open up i guess. at my computer it does not show up there as removable drive or anything please help. also is there a way i can back up the files so i dont lose them?

Check if it’s recognized on the disk management window, also try installing the SES drivers. Check the link below for the steps.