I've tried several ways to transfer my music collection on my SD card with no success. Here is what I've tried and what's happened. iSyncr quoted me a transfer time of 5 hours (!) via USB transfer and gave me an error message at the 23% mark on 3 occations. I then formatted my SD card and moved on. DoubleTwist did nothing. I looked in Settings, but I was unable to transfer anything onto the SD card with my Active connected to my Mac via USB. AFT was useless. AirDroid recognizes only 11 GB of my 64 GB card. WiFi File Transfer Pro seemed to be my saving grace. I tried uploading my entire connection in one click and the program froze. I then finally had success by uploading individual artist folders. Basically I'd have to pick one artist and I'd be able to upload all their albums in their folders in one click. Okay this is progress. This is obviously going to take a great deal of time because my collection is pretty large. So I did artists A-B and was looking to do C today. Well I go to upload an artist and I get error messages in the form of red X's when the upload is attempted. Then things get crazy. My Active tells me that my SD card can now be removed. WiFi File Transfer Pro no longer recognizes the SD card. I go to Settings on my Active and it doesn't recognizes my SD card. I restart my phone. Same thing. I get the notifcation that it's safe for me to remove the SD card. I restart again and my Active recognizes my SD card and still has all my previous music files on it. I connect to WiFi File Transfer Pro and all my previous music is on it but I now see a tmp file labeled DeleteMe followed by a serious of numbers. I delete said file. I've uninstalled WiFi File Transfer Pro. I've formated the SD card. It is recognized by my Active with 59.47 GB available. I'm pretty sure File Transfer Pro caused this headache. I believe my SD card is just fine. I need a way to successfully transfer my music onto my SD card. Please help me. This is driving me crazy. Thank you.