Start with a clean baseline
Use DeviceOK to collect browser-visible evidence for the external ssd / hard drive, then move to the operating system or manufacturer only when the browser reaches a documented boundary.
Live evidence
Relevant checks
Device & Browser Information CheckSee browser-exposed screen, viewport, language, CPU-thread class, memory class, connection hints, and platform information without installing software.
→Browser Storage Quota TestSee how much browser-managed storage this site is using and the quota the browser reports for this origin.
→First sequence
Do the high-signal checks before risky changes
- 1
Check whether the OS detects the drive
- 2
Try a known-good data cable/port and required power
- 3
Do not format an unreadable drive before deciding whether data recovery matters
Decision points
What the result should change
If the function works in a neutral deviceok testPrioritize the affected app, permissions, routing or configuration.
If the function fails in deviceok and another trusted pathPrioritize connection, OS recognition, official diagnostics and then hardware.
If the browser cannot access that subsystemUse the OS/OEM diagnostic route instead of interpreting missing browser data as a failure.
Browser can help check
- Test browser storage/file workflow around uploads
- Explain OS-level recognition and connection steps
Browser cannot prove
- Read SMART health generically
- Scan bad sectors
- Measure raw drive speed without file access and careful methodology
Repair boundary
Know when to stop browser troubleshooting
- Avoid firmware/driver downloads from unofficial aggregators.
- Change one variable at a time and retest under the same condition.
- Physical damage, abnormal heat, liquid exposure and battery swelling require appropriate service handling.
Used-device inspection
What to verify before paying or signing off a repair
- Test the exact functions you depend on
- Inspect all ports/controls and included power accessories
- Record pass/fail evidence before purchase or repair handoff