My old Pentium II has died - think the power supply has gone - won't switch on, cable is OK. Not too bothered about PC, rarely used it, but how do I cheaply and easily access the data on the hard drive?
A good caddie will have its own power supply unit.
It will have a case which is easy to open.
Any usual HD removed from a computer should fit snuggly inside with data and power leads provided and connecting inside the case. (The old HD is almost certain to be an IDE (ATA) type, not a SATA, but both are available)
Data can be passed to and from another computer via a USB lead which is also supplied with the caddie.
That is a very Techie solution which would require you to break the Warranty Conditions of most new PC's and would also require you to know how to set it up as a Slave Drive. Not exactly beginners material really.