diff --git a/src/main/java/device/usbPlayer/UsbPlayer.java b/src/main/java/device/usbPlayer/UsbPlayer.java
index 75f6a21..0a6e75d 100644
--- a/src/main/java/device/usbPlayer/UsbPlayer.java
+++ b/src/main/java/device/usbPlayer/UsbPlayer.java
@@ -118,7 +118,12 @@ public class UsbPlayer implements Device {
 
     @Override
     public void prev() {
-
+        int currentIdex = Playlist.indexOf(playTrack);
+        int nextIndex = Playlist.size() - 1;
+        if (currentIdex != 0) {
+            nextIndex = (currentIdex - 1);
+        }
+        playTrack = Playlist.get(nextIndex);
     }
 
     @Override