sd card doesn't read in luedio t2+

[joneshomebody]

Used an old micro sd from a defunct phone, phones played audio files. Deleted all files and reloaded when the drive showed red in pc , win 8.1 when on usb,( not seen that before)- what did I lose that is necessary for the device to read the card?

 

[joneshomebody]

Found out that my t2+ does not play .wav files as it was said to in the advert, does play .mp3 happily however.
I have emailed bluedio to see if it is a fault with my device or negligent misdescription.