What to do right now
- Open the health screen with the drive plugged straight into the PC and see which values appear.
- If most are Not reported, the USB bridge is hiding SMART; that says nothing about whether the drive is healthy.
- Try a docking station or another enclosure, or connect the bare drive by SATA, unless it is hardware-encrypted or failing.
- Without SMART, a read-only surface scan is the next best health check.
Step by step
Connect the drive directly to the PC
Plug the external drive into a USB port on the computer itself, not a hub or a monitor port. If it has its own power adapter, use it. Open Disk health & tools in FileFix Ultimate and press Check again.
See what the drive actually reports
Select the external drive. If you see only Windows health status and most other indicators say Not reported, or the drive is rated Not enough data, the enclosure is not passing SMART through. The app shows what Windows provides and does not fill the gaps with guesses.
Try another dock or enclosure
Bridge chips differ. A SATA docking station or a different enclosure often passes SMART where the original case does not. If the drive is a standard SATA drive in a removable case, move it and check again.
Connect the bare drive by SATA if it is safe
In a desktop PC, connecting the drive to a spare SATA port and power cable gives full SMART access. Do this only if the drive is not clicking, the USB connector is not part of the drive's own circuit board, and the case does not encrypt data.
Use the advanced SMART table for SATA drives
If some values show Readable with the advanced setting on, open Settings and turn on Read the SATA SMART attribute table (advanced). It sends read-only SMART queries and is off by default.
Fall back to a surface scan
If SMART stays hidden, run Surface read scan with Quick sample. Slow areas or unreadable blocks tell you about the drive even without SMART. If it clicks or disconnects, create a drive image instead of scanning.
Why USB enclosures hide SMART
Inside an external case, a small bridge chip converts USB into SATA or NVMe. USB storage speaks a SCSI-style command set, while SMART requests are ATA or NVMe commands. To deliver them, the bridge has to support a pass-through mechanism and Windows has to use it. Many bridges, especially older or low-cost ones, do not, and some answer with partial or vendor-specific data.
So two identical drives can behave differently in two cases, and the same drive can show full SMART in one dock and nothing in another. Card readers and most USB flash drives offer no usable SMART at all.
Not enough data is not a verdict
When a value cannot be read, FileFix Ultimate shows Not reported or Not enough data instead of Healthy. That is deliberate: a drive behind a silent bridge may be fine or may be close to failing, and the screen cannot tell which. Windows health status may still say Healthy, but it is based on very little information in this situation.
Some signals stay useful even without SMART. Interface CRC errors usually point to a cable or connector rather than the disk. Frequent disconnects, very slow copies or a drive that has to be replugged are worth taking seriously whatever the health screen shows.
Before you take the drive out of its case
Many portable drives have the USB connector soldered onto the drive's own circuit board, so there is no SATA connector to use. Some models also encrypt data in the bridge chip; if you remove the bare drive, its contents can be unreadable without the original enclosure. Opening the case may also affect the warranty. Check the model before you open anything, and leave a drive that clicks or does not spin up alone; that is a case for a recovery lab if the data matters.
When SMART cannot be read
- Drives with the USB port built into their circuit board can only be read through USB, so SMART may stay unavailable.
- Hardware-encrypted external drives must stay in their original enclosure to keep the data readable.
- USB flash drives, SD cards and card readers generally report no usable SMART.
- Multi-bay enclosures and RAID boxes often expose only the array, not the individual drives.
How FileFix Ultimate helps
- Shows only the health values Windows can actually read and marks the rest Not reported instead of guessing.
- Explains each value it does receive in plain language, including interface CRC errors that point to cables.
- Offers an optional read-only SMART attribute table for SATA drives, off by default.
- Provides a read-only surface scan and a drive image that skips bad sectors when SMART is not available.
- Free for personal use, offline and portable, so it can run from a USB stick on any Windows 10 or 11 PC.
FileFix Ultimate is free for personal use, works offline and never writes to the drive you are recovering from. Business use needs a one-year licence per PC. Check the signature before you run it.
Frequently asked questions
Do USB flash drives and SD cards have SMART?
Generally not in a form Windows can read. A surface scan and a fake capacity check tell you more about them than a health screen can.
Can a bad cable or port look like a failing drive?
Yes. Loose cables, weak USB power and worn connectors cause disconnects, slow copies and interface CRC errors. Try another cable and a port on the PC itself before deciding that the drive is failing.
Is a docking station better than the original enclosure for reading SMART?
Often, but not always. It depends on the bridge chip inside, not on the brand. If one dock shows nothing, another may show full values for the same drive.
Why does Windows say my external drive is healthy when the app shows Not enough data?
Windows reports an overall status even when it receives very few values through the USB bridge. The app keeps that status but does not treat it as proof, because the detailed indicators behind it were not available.