# Synology USB Copy Troubleshooting

## Issue
USB Copy shows "Unavailable" status with message:
**"No USB/SD storage mounted to the front port or storage used for another task"**

## Possible Causes

### 1. No USB Device Connected
- USB/SD card not plugged into the front USB port
- USB device not properly connected
- USB device not recognized by Synology

### 2. USB Device Already in Use
- USB device mounted for another purpose (file sharing, etc.)
- Another USB Copy task using the same device
- USB device mounted as a shared folder

### 3. USB Copy Task Configuration Issue
- Task configured but USB device not detected
- Wrong USB port selected in task settings
- USB device format not supported

## Solutions

### Solution 1: Check USB Device Connection

1. **Physically check:**
   - Ensure USB device is plugged into the **front USB port** (not rear ports)
   - Try unplugging and reconnecting
   - Try a different USB device to test

2. **Check in DSM:**
   - Control Panel → External Devices
   - See if USB device appears in the list
   - Check if it shows as "Mounted" or "Unmounted"

### Solution 2: Unmount USB Device from Other Uses

1. **Check if USB is mounted as shared folder:**
   - Control Panel → Shared Folder
   - Look for USB device name
   - If found, unmount it first

2. **Check other USB Copy tasks:**
   - USB Copy → Check all tasks
   - See if another task is using the USB device
   - Disable or delete conflicting tasks

3. **Unmount manually:**
   - Control Panel → External Devices
   - Select USB device → Unmount
   - Then try USB Copy again

### Solution 3: Check USB Copy Task Settings

1. **Open USB Copy task:**
   - USB Copy → Select "Copy Button" task
   - Go to "Task Settings" tab

2. **Verify settings:**
   - Source: Should be [USB] or specific USB device
   - Destination: Should be valid path
   - Make sure correct USB port is selected

3. **Check "Trigger Time" tab:**
   - Ensure trigger is properly configured
   - If using "Copy Button" trigger, ensure button is enabled

### Solution 4: Restart USB Copy Service

1. **Stop USB Copy:**
   - Package Center → USB Copy → Stop

2. **Unmount all USB devices:**
   - Control Panel → External Devices → Unmount all

3. **Restart USB Copy:**
   - Package Center → USB Copy → Start

4. **Reconnect USB device:**
   - Plug USB device into front port
   - Wait for it to be recognized
   - Try USB Copy again

### Solution 5: Check USB Device Format

- **Supported formats:** FAT32, NTFS, exFAT, HFS+, ext4
- **Not supported:** Some encrypted formats, certain proprietary formats
- Try formatting USB device to FAT32 or exFAT if needed

## Diagnostic Steps

1. **Check USB device recognition:**
   ```
   SSH to NAS → Run: lsusb
   Or check: Control Panel → External Devices
   ```

2. **Check mount status:**
   ```
   SSH to NAS → Run: mount | grep usb
   Or check: Control Panel → External Devices → Status
   ```

3. **Check USB Copy logs:**
   - USB Copy → Settings → View logs
   - Look for error messages

## Common Issues

### Issue: "Copy Button" Task Shows Unavailable
- **Cause:** USB device not detected or already mounted elsewhere
- **Fix:** Unmount USB device from other uses, then reconnect

### Issue: USB Device Not Detected
- **Cause:** Wrong port, unsupported format, or hardware issue
- **Fix:** Try front port, check format, try different USB device

### Issue: Task Configured But Won't Run
- **Cause:** USB device mounted as shared folder or used by another task
- **Fix:** Unmount from shared folders, disable other USB Copy tasks

## Quick Fix Checklist

- [ ] USB device plugged into **front USB port**
- [ ] USB device appears in Control Panel → External Devices
- [ ] USB device is **not** mounted as shared folder
- [ ] No other USB Copy tasks using the same device
- [ ] USB Copy service is running (Package Center)
- [ ] USB device format is supported (FAT32/exFAT/NTFS)
- [ ] Try unmounting and reconnecting USB device

## If Still Not Working

1. **Check Synology logs:**
   - Control Panel → Log Center
   - Look for USB-related errors

2. **Try different USB device:**
   - Test if issue is device-specific

3. **Check Synology model compatibility:**
   - Some older models have USB Copy limitations
   - Check Synology documentation for your model

4. **Contact Synology Support:**
   - If hardware issue suspected
   - Provide model number and error details