Simply copying files from a Windows recovery USB to another drive may not make the new drive bootable. Boot records, partition layout, and file system settings also matter.
The cleanest method is to create a new recovery drive from the Windows computer you want to repair. Search for Recovery Drive, select the system files option if needed, choose the USB drive, and let Windows build fresh boot files for that PC.
A bootable recovery drive needs more than visible files. Windows also depends on the partition type, boot sector, EFI files, and firmware boot mode. If any of these parts is missing, the copied USB may appear normal in File Explorer but fail in the boot menu.
Step 1. Open Qiling Disk Master, go to Tools and utilities, and choose Disk/Partition clone.

Step 2. Select the original recovery USB or recovery drive as the source disk. If the drive has several small boot partitions, select the whole disk instead of only one partition.

Step 3. Select the new USB drive or external drive as the destination. Make sure it is the spare drive because the destination will be overwritten during cloning.

Step 4. Preview the partition layout. Keep the boot and recovery partitions together so the copied drive can remain bootable.

Step 5. Click Proceed and wait for the clone to finish.
Step 6. Restart the computer, open the boot menu, and test whether the new recovery drive starts. If it does not, recreate the recovery drive in Windows instead of using file copy.
File copy is not always enough for a recovery drive. Create a new recovery USB or clone the drive, then test booting before storing it for emergencies.