Support pc to galaxy ace photo transfer

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http://androidforums.com – hi all have got some photos on my kies program that where originally on my phone that I wish to transfer back to my Ace when connected to kies I plug in my phone via USB--- then the SD card (2gb) seems to unmount itself (all my apps that are on my phone screen disappear to just a green box with the android 'robot' on it) and the photos that i need on my phone wont go to SD card(as phone thinks SD card is unmounted) and try to go to internal memory but unable to do that due to insufficient memory available. any one any ideas please how to sort this? cheers (General)