Storage on to SD card not working

[ALass]

USING SD CARD for storage on E5

[Uliwooly]

@ALass 

you can use the SD card for media (music, pictures and videos)

[ALass]

I can Mount the card. I can get the screen where I can tick photos to move. But I'm not allowed to tick. I'm being told I've got 26.97 GB available on a 28 card but I can't get the transfer command to be highlighted.

I took out the card this morning and re-inserted it. It's a nano card so I can't re-format it onto this macbook air.

Can you help.