How to upgrade your Droid micro card in a Windows environment...

You will need a very small screwdriver unless your battery has a removal strap. Also, you need a SD adapter that enables your micro to be inserted into a laptop or PC with an SD slot. Amazon had mine shipped in 3 business days, no charge for shipping.

If your battery has no strap and doesn't want to budge, get a eyeglass kit's flat head screwdriver or nail file. On the edge of the battery with no metal connections, gently pry it loose from the phone. Now take a piece of Scotch tape, about 1 inch. Fold 1/4 of the tape back onto itself to create a pull tab. Now place the exposed adhesive surface of the tape to the battery so that the dry surface of the tape is below the batter when the battery is replaced. Now you have a neat little tab for removing the battery later. Make certain the adhesive surface does not cover any metal connectors or positioning tabs.

Now remove your micro SD card, insert it into the SD adapter. It is now ready to insert into your computer's card port, which should be not much wider than a postage stamp. Your computer should automatically "see" the new drive and its contents. Create a subdirectory for this content on your C drive using your Windows File Manager. Now SELECT each individual file folder listed on your SD card. Right click and choose COPY. Now move your mouse to the the subdirectory you created, and and right click PASTE. You should see all the file folders appear in the new subdirectory.

Below the file folders on your SD card, there are some misc. files not associated with a subdirectory. Use your mouse, click, and SELECT these misc. files. Now right-click and choose COPY. Move your mouse to the C drive subdirectory, right-click and PASTE these files to the C drive.

Now remove the SD card adapter and the micro card that came from your phone. Put the micro SD card safely aside. Put your new micro card (I recommend the SanDisk 32GB Class 10...more space and faster I/O operations) into the adapter, and slide the SD adapter into your computer. Now you will reverse the copy/paste operation: start with your C drive's subdirectories (the subdirectory you created to received your phone's SD card contents), SELECT and COPY subdirectory titles first, then PASTE them to the SD drive. Repeat to capture and copy the misc. files at the bottom of the directory.

You now have your 2GB contents moved to a much larger 32GB SD card, so your phone can read them properly.

I got two errors at this point: 1) source files names were too large for the destination folder. I hit SKIP and moved on. 2) One of my SD card adapters would not stay in the read/write position...the switch kept moving when I inserted the card. Fortunately I bought two and was able to finish the task for both my Droid X and my wife's.

Now slide your 32GB SD card back into the phone, replace the battery, and boot up. If you have a file manager app, start it up to confirm your new storage capacity.

Done.

Note: Do NOT highlight and copy/paste all the SD card contents in one operation. If you you, Windows might insert a "SD" file folder then put all your files under that folder. This file arrangement is altered from the original layout. I don't know if it's a problem or not, but it's best to keep the file arrangement identical between the SD card drive and the C drive. That's why you copy/paste file folders first, then misc. files.

This will enable you to loads lots more songs and content, and your phone's I/O operations will go faster. You should notice fewer or no buffering delays when playing songs or video content.

Place your old SD card in a safe place.