This question is a little too complicated to be fully explained in the FAQ, so we are moving it over to the new dev blog.  While you are here, feel free to subscribe to the blog!

Let's first define what we are talking about.  "I have duplicates" is a little too vague to give a generic solution.  Are you seeing duplicate files on the device's memory?  Or are you seeing duplicate files in your music player? Which music player?  Which Android device?



For now, let's narrow the question to "Why am I seeing the same song show up twice in my music player?"
There are two reasons you could be seeing this.

1. You do have a duplicate file on your device's storage, we will go through all the possibilities here a little later.
2. Your device's media cache is corrupt and needs to be reset.  

Moving on, let's make the question "Why am I seeing the same album show up twice in my music player?"
This one is more complicated.  In fact, we've made a whole other post for it.

Now, let's tackle the last question "Why do I have multiple files on my device's storage?"
If you know there are duplicate files, then you probably already know their locations.  However, we've made a list of places to look if you suspect that there are multiple files on your device.  This list should help jar you memory, but we strongly suggest using the search tools built into your Mac or PC or Astro File Manager to simply search for the duplicate file and delete it.  We will keep this list up to date, so let us know if you found a reason that we missed!

1. Have you downloaded the song from Amazon?  If so, you might have another copy of the song in the "AmazonMP3" folder. 
2. Have you updated a song?  For instance, if you change the "artist" field of a song and then sync again, you might end up with two copies of what is essentially the same song.  You can fix this by check "Remove Music Not In These Playlists" in the USB app, or select "Remove Abandoned" in the WiFi app.
3. Do you have multiple copies of the same song in iTunes?  Are you not sure if you do?  In iTunes, go "File->Display Duplicates".  iTunes will let you know if it thinks two songs might actually be the same.  You can delete the duplicates and then go "File->Display All" when you are done.
4. If your Android device has two storage areas, have you synced the same album to both the internal and external storage areas?  That will certainly cause you to have duplicates.
5. Have you changed the folder iSyncr syncs to? Some people like to sync to the "Music" folder instead of the "Syncr" folder.  After making this change, you might have music in both folders.
6. Have you used software other then iSyncr in the past?  If so, you might have duplicates on your device if you haven't removed whatever the other application did.
7. iSyncr created duplicates.  This shouldn't happen and we currently don't know of any reason it would.  If you do find this behavior, email us and give us the two different paths that music was copied to and we will work with you to fix it! If you believe that iSyncr is creating the duplicates, please contact us at [email protected]