This is a little tip for Mac users who are new to Pogoplug, new to Mac OS, or both.  (Longtime Pogoplug users or Mac Terminal nerds, this process may be familiar to you, so feel free to ignore :)

If, for some reason, you are experiencing trouble with your thumbnails, previews, or data on your drive, deleting the ".cedata" file on the Pogoplug connected drive can help.  It allows the Pogoplug to "start fresh" when scanning your media.  

For example, I accidentally duplicated my Music folder within my Music folder on my Pogoplug, meaning I had two copies of every song I had.  I then deleted the second folder, but the Pogoplug had trouble accessing the media that remained.

Deleting the .cedata folder on my drive helped immensely.  Here's the quick way to do it.  First, eject your drive in the My.Pogoplug interface and disconnect from the Pogoplug.

Step two involves the Mac Terminal.  Go into Applications => Utilities and launch Terminal.

Type in this command and press enter:

defaults write com.apple.Finder AppleShowAllFiles Yes

Nothing will happen right away.  Next, go to the Apple Menu, click "Force Quit," then Finder, then Relaunch Finder.

Now, connect your Pogoplug drive to a regular USB port.  You will see the hidden .cedata folder on the drive when you otherwise would not.  Delete it (and empty the Trash if necessary) then reconnect to your Pogoplug.

Note that this change will stick and you will now always see hidden files.  To switch it back, run the same command only replacing "Yes" with "No," and the OS X Finder will no longer reveal the hidden files.

One way or another, this is a great, simple troubleshooting step if you are having issues.