Thanks for your first replies.
My WD TV Play Media Player is referenced as WNT2909xxxxx. He is Gen 1.
My external hard drive WD My Book Essential 3.0 with 4 TB is referenced WDBACWxxxxxxx
I already tried to partition in 2 x 2 TB but it also doesn’t work. Blue screen with no menu…
I had a look on the WD support = http://wdc.custhelp.com/app/answers/detail/a_id/9525/p/208,455/session/L3RpbWUvMTM2NDcyOTU2Ny9zaWQvbXlRVXZ4bWw%3D
It seems that
|WD My Book Essential 3.0
is not compatible at all with WD TV Play Media Player
But it is the only hard drive not compatible !! Why ? What can I do to use my WD TV Player with My Book Essential 4 TB ?
What is the solution ? I can’t send back my 2 My book Essential 4 TB to the shop !!