Final answer:
An external hard drive is a suitable secondary storage device for transferring text files from a school computer to a home PC due to its large storage capacity and ease of use.
Step-by-step explanation:
A secondary storage device that could be used for transferring text files from a school computer to a PC at home is an external hard drive. This device works by magnetically encoding information, which allows for the storage and retrieval of data quickly. External hard drives are widely used because they offer a large storage capacity and durability.
When you need to transfer large text files or a significant number of files, an external hard drive is a practical choice due to its robust storage capabilities. To transfer the data, you simply connect the external hard drive to the school computer, copy the text files onto it, and then disconnect it. At home, you can connect the drive to your PC and copy the files onto your personal computer.