I will be trying this on Surface Pro. Add microSD storage to your libraries, getting music files to appear in the app, caused by limitations with the built-in libraries—Documents, Music, Pictures, and Videos—in Windows 8. (Still considering whether to port out the recovery disk to release 7GB space).
Add microSD storage to your libraries, allowing the content stored there to appear in the appropriate Metro-style apps. Using a 32 or 64 GB microSD card and have added folders named Music, Pictures, and Videos to the card. Added music, photos, and videos to the appropriate folders on the microSD card to ensure that everything works as expected.
The first step is to create a folder on your Surface primary storage, or C: drive. Just create one called SD right in the root of the C: drive, so C:\SD in this case.
Next, visit Disk Management, which, yes, exists in Windows RT too. The easiest way to find it is use the new Windows 8 (and RT) power user menu by tapping WINKEY + X or mousing into the lower left corner of the screen and right-clicking. Choose Disk Management from the menu that appears.
In Disk Management, locate your microSD card, right-click it, and choose Change Drive Letter and Paths. Then, in the Change Drive Letter and Paths window, click Add. Click Browse next to “Mount in the following empty NTFS folder” to find C:\SD and add it to the paths that are attached to that drive. Now, you will see two entries for the microSD card: It’s actual drive letter (E: in my case) and the new path (Windows (C
\SD in my case).
Now, visit each library in turn and add the correct microSD-based folder to the library using the Manage Library command in the Manage tab of the ribbon. For the Music library, for example, you will add the location C:\SD\Music.
Repeat this for the Pictures and Videos libraries, again using the correct folder. Be sure to navigate to C:\SD\whatever instead of E:\whatever.
Now, launch the various Metro-style apps—Xbox Music, Xbox Video, and Photos—and ensure that your content appears.