Problem with SD card

[Hoil]

Hi!
In my SD card, in the folder "IMPORT", there is a wave track (0 bytes- it is nothing) which I cannot delete and it blocks me from importing other tracks on SP-404SX. The screen writes "Unsupported".

Can you help me?
Thank you!!

[Hoil]

I found a solution.
I put it in another folder, out of the "IMPORT", but, you know, I want to delete it from my SD card.

[jetson]

Did you reformat the card?

[Hoil]

No..