– If it’s an old spinning hard disk and feels completely solid (no ventilation holes), it may be a encased OEM drive that overheats quickly. Don’t run it for long without backup.
If you can share a photo or more details (model number, size, connector), I can tell you exactly what it is and whether the data is recoverable. hard disk iomega
It sounds like you’re describing an that feels like a solid piece — likely meaning it doesn’t appear to have moving parts, or it’s unusually heavy and sealed. – If it’s an old spinning hard disk