WTFIsStalling 0.3.0
What's new
Slow disks are named, not numbered. Instead of "Disk 2", the report now says which drive it is: drive letters, model, how it is connected, size, firmware version and how full each volume is, for example:
Disk 2 (D:), SOLIDIGM SSDPFKKW020X7 - responding slowly / NVMe SSD, 2.0 TB, firmware 001C. D: 94% full.
Advice that fits the drive. A USB drive, a hard drive, an NVMe SSD and a SATA SSD each get different things to try, and a nearly full volume is called out first because that alone makes drives slow.
The event log and the disk latency table show the drive letters too. Serial numbers are deliberately not read, since reports get pasted into forums.
Download
WTFIsStalling.exe is the app. wtfis-cli.exe is the same engine for the console.
Windows SmartScreen may warn about a new unsigned program: More info -> Run anyway. Checksums are in SHA256SUMS.txt.