Hi there jjsan1066,
In most cases, you will be able to convert an external to internal drive. You will need power and SATA cables as lodders suggested.
Yet, you will need to keep in mind several things:
- Some external devices have proprietary connectors. This means that you will not be able to attach it with a SATA cable internally.
- Some devices have hardware encryption. You will not be able to access the data stored on the drive in case it is outside the enclosure.
- You should always back up the data stored on the drive before taking it out of the enclosure.
- Of course, this will void the warranty.
Let us know in case you have some more questions,
D_Know_WD