Issues with 1 WD TB EHD

every computer i connect my 1 TB EHD is having issues recognizing it and when it does its says the folders are empty. i go to properties of the drive and and all the used memory is still the same so all files are on it just not being recognized. does anyone know what the issue is?

What OS are you using and does the drive show in Disk Management? What does it say in Disk Management?