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Home / Device types / External SSD / Hard Drive
External SSD / Hard Drive diagnostics

Test what the browser can see. Know when it cannot.

DeviceOK can diagnose browser/file workflow symptoms, but a browser cannot read generic SMART health or scan disk sectors without explicit file/device access.

Run these first

Relevant live checks

Device & Browser Information CheckSee browser-exposed screen, viewport, language, CPU-thread class, memory class, connection hints, and platform information without installing software.
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Browser Storage Quota TestSee how much browser-managed storage this site is using and the quota the browser reports for this origin.
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First diagnostic sequence

Do the high-signal checks before risky changes

  1. 1

    Check whether the OS detects the drive

  2. 2

    Try a known-good data cable/port and required power

  3. 3

    Do not format an unreadable drive before deciding whether data recovery matters

What DeviceOK/browser can help check
  • Test browser storage/file workflow around uploads
  • Explain OS-level recognition and connection steps
What this browser page cannot prove
  • Read SMART health generically
  • Scan bad sectors
  • Measure raw drive speed without file access and careful methodology