I was transferring some files via USB to my Droid when Windows suddenly reported the destination was no longer available. I tried to get my Droid to reconnect, but no dice. Not only did repeated attempts fail, but my Droid kept freezing up hard. I had to pull the battery half a dozen times. My Droid is normally a tad slow, but reliable. It occurred to me that the initial problem when it was connected to my desktop might be causing this one. I put the SD card into a card reader, backed it up to my laptop, and used the Droid to reformat it. This seems to have fixed the Droid.
Back to the desktop. About two weeks ago I had my Kodak Zi8 HD camera connected to a USB hub on my desk. The camera started acting flaky, frequently losing its connection. It worked better, though not perfectly, when plugged directly into my desktop.
I have a Logitech USB wireless trackball. The other day it was dead. Could not get it to reconnect, period. I went back to my old wired trackball. About an hour later on a whim I hit the 'Connect' button on the wireless one and it started working again.
Then today's problem with moving files to my Droid - while it was connected via USB.
See a pattern here? Also, a few days ago my desktop started spontaneously turning itself off. I can't track this directly to a USB problem, but I strongly suspect my motherboard is developing a hardware problem. Oh, and I just remembered that one of my USB thumb drives died a couple of months ago when I plugged it into my desktop. It had not been used heavily and had previously worked fine when plugged into my laptop.
I think I'm going to save myself any more headaches and replace my motherboard. I'm looking at the
GIGABYTE GA-G41M-ES2L from Newegg. Good price & reviews, and it'll work with my existing CPU and RAM.