Timemashine transfer


Does anybody know what may have happened since i did a complete transfer from my laptop  to the WD smart disk with Timemashine  so that later on can store everything into my stationary computer. But since i did the transfer, the disk cant connect with the laptop nor the stationary. I can see the disk when i start the WD smart, but when i type in my password it disappears.

Does anybody know what may have gone wrong along with the Timemashine-transfer. Took me a whole night to store everything on the disk.



Which WD external drive are you using?  Do you have a product number?  Also, when it disappears, does the drive still show up in Disk Utilities?