Unable to move apps to SD card when plenty of space

Hi I have a 16gb SD card in my Sony tablet that in the past I have moved a few apps over to, i have nearly filled up the tablets internal memory so decided to move a few more over after only moving one app I tried another which is 600mb but after a while I get a error saying their is not enough space left on the SD card when their is 10gb left anyone have any ideas why it would do this

Thanks in advance

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