Windows 10 may assign a drive letter but lack the correct file system driver. Go to Disk Management and assign a letter manually (right-click the volume → Change Drive Letter and Paths).
Select the .inf file and ignore the "Windows cannot verify the publisher" warning by clicking . Important Limitations icd-p520 driver windows 10
The Sony ICD-P520 is a testament to durable hardware outlasting software support. While Windows 10 won’t welcome it with open arms, the works for the majority of users. If you’re uncomfortable with manual driver installation, the virtual machine method is bulletproof. Windows 10 may assign a drive letter but
Do not panic. There is a using a driver from a similar, slightly newer Sony recorder. slightly newer Sony recorder.