Three 2.5" SATA laptop hard disk drives (160GB, 320GB, and 500GB unformatted) plus one 2.5" USB-A 3.0 HDD external enclosure.
These are believed to be fully working - they have each had a full read/write surface scan, showing no errors, and SMART status reports healthy with no bad sectors. However, I would still recommend you carry out your own error checks before using them, and use them only for non-critical data or as an extra backup of anything critical.
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