I have a Samsung Galaxy Ace Plus. I have never downloaded any software and up untill now have had no problems connecting to my PC and transferring photos. For some reason when I try to connect now I get this message: "Attention USB connected, disconnect cable'. So now for some inexplicable reason I can now not connect to my PC. Any ideas? This phone is the worst phone I have ever had, it comes with no instructions and the manual available online is useless, in short it is a pile of the proverbial. If you are tempted, take my advice: Buy a ball of string and two empty cans!