Hi
Welcome to Microsoft community.
To help you sync your Windows Media Player (legacy) music and playlists to your Samsung Galaxy A35, follow these steps:
- Verify Basic Settings
- USB Connection Mode
- After connecting your phone, pull down the notification shade and select File Transfer (MTP) mode (avoid "Charging only" or "Photo Transfer" modes).
- If the option doesn’t appear automatically, go to Settings > Connections > USB Settings on your phone and manually switch to MTP.
- Trust the Computer
- On the first connection, your phone may prompt "Allow access to device data"—select Allow or Always Allow.
- Fix Driver Conflicts
- Uninstall Samsung Drivers
- Open Device Manager on your PC.
- Expand Portable Devices or Other Devices, right-click your phone’s name (may show an error icon), select Uninstall Device, and check Delete the driver software (if available).
- Reboot your PC, reconnect the phone, and let Windows install the default MTP driver (not Samsung-specific drivers).
- Disable Driver Signature Enforcement (Windows 10/11 Only)
- If driver installation fails, temporarily disable driver signature verification:
- Hold Shift and click Restart > Troubleshoot > Advanced Options > Startup Settings > Restart, then press F7 to select Disable Driver Signature Enforcement.
- Reconnect the phone and retry.
- If driver installation fails, temporarily disable driver signature verification:
- Configure Windows Media Player
- Manually Add the Device
- Open WMP, go to the Sync tab, click More Options > Devices.
- Ensure your phone isn’t listed as an "ignored device." If it is, right-click and select Allow Sync.
- Reset the Media Library
- Close WMP and delete the library database file:
- Press Win + R, type %LOCALAPPDATA%\Microsoft\Media Player and delete CurrentDatabase_372.wmdb.
- Restart WMP and reimport your music library.
- Close WMP and delete the library database file:
- System-Level Fixes
- Enable Critical Services
- Press Win + R, type services.msc, and ensure the following services are set to Automatic and running:
- Windows Media Player Network Sharing Service
- Portable Device Enumerator Service
- Press Win + R, type services.msc, and ensure the following services are set to Automatic and running:
- Disable Phone Optimization Settings
- On your phone, go to Settings > Battery > Background Usage Limits and ensure WMP or related processes aren’t restricted.
- In Developer Options (tap "Settings > About Phone > Software Info > Build Number" 7 times), disable USB Debugging and Optimized Charging Control.
- If Issues Persist
- Use Third-Party Sync Tools. Due to current forum rules, I am unable to recommend more. You can search for reputable software on the internet.
- Manually Transfer Playlists
- Export playlists from WMP (.wpl or .m3u format), copy them to your phone’s music folder, and load them via a local player.
- Hardware Troubleshooting
- Try a different USB cable or PC USB port (preferably a native USB 3.0 port on the motherboard).
- Test on another PC to rule out device compatibility issues.
If none of the above works, consider migrating to modern sync solutions like iTunes, or Samsung Music cloud sync.Best regardsDerrick Qian | Microsoft Community Support Specialist