I have a Motorola DroidX Android phone, so it might be a bit different than your phone.TheLaw said:
I haven't downloaded any cellular file manager or transfer software. When I connect my Droid to my PC it shows up as a new drive letter. I can navigate through all the folders on my cell phone and the SD card in Windows Explorer.
I loaded some videos on my SD card using this method and the Android Gallery app can play them fine. Try managing things from your PC.