Having waded through 12 pages of these posts I have only just seen some hope from the last couple of posts.
I have a 2 day old tablet and have just ordered an Evo plus 128 gig card for it and found this thread when looking for info about what speed cards the tablet can handle.
My question is - how many people have used SD cards without an issue ?
I know there are 12 pages here but Lenovo must have sold thousands of these tablets so we could be seeing an issue that affects 1 in 10, 1 in 50, 1 in 100, 1 in 1000 - who knows ?
I have quite a few other cards in the house but have bought a new one specifically for this tablet. I am tempted to try a few now but think I will wait until later when Amazon arrives.
EDIT: The new Samsung Evo+ 128 gig card has arrived. I did a deep format using Windows as advised above. Turned off tablet - put card in - turned on tablet and waited 5 minutes. It appeared in the notification bar and I was given to the option to use it as a portable card or format it to use only in the tablet where it could be used for apps and photos. I chose to leave it in the tablet and it formatted it. The only issue was it warned that it appeared to be slow and I should consider getting a faster card. There are not many that are faster than an Evo+ so there might be an issue there although I think it will probably settle down. Quite pleased and if I do get any problems I will come back and update here.
Update #1 The card is in and working but does have some issues in this dedicated mode imo
* Settings/Storage shows it as present and you are given the option to reformat it as a removable card that can be read by other devices.
* The File Manager app that comes preinstalled on the tablet cannot see it and just reports the 16GB memory status. I have never had a file manager on any Android device before and have always had to download one from the Playstore. This one is $hit so i am going to delete it but it is a nice thought ;)
* FX File Expolrer only reports the 16GB as local storage but does show the card in Storage Tools/Mount Eject
* ES File Explorer also only reports the 16GB as local storage and does not show the card anywhere.
I normally use FX but am surprised about ES as that is usually pretty good. Both apps are the free versions. FX is a better app anyway as it is ad free.
It is too early to decide how robust the card is. I will have to wait until the inbuilt 16GB is full and then I will find out. Got the feeling that it will work ok.
Hope this helps - would be good to hear from anyone who has more experience using a card - good or bad .....