How to Fix You Need to Format the Disk Before You Can Use It? Find 6 Methods Here! • Method 1. Try Different USB Port or PC • Method 2. Using Scan and Repair • Method 3. Update/Reinstall Device Driver • Method 4. Change Drive Letter • Method 5. Using CHKDSK Command • Method 6: Recover Data and Format Disk 📌How to Use 4DDiG to Recover Data from Error external devices? Step 1: Download and install Tenorshare 4DDiG on your computer. Step 2: Connect your external hard drive and select it to scan. Step 3: After the scanning, select files to preview and click Recover to save them.