Final answer:
USB Flash Drives and Optical Discs are commonly used to transfer data between computers.
Step-by-step explanation:
The types of storage that are commonly used to transfer data from one computer to another are USB Flash Drive and Optical Disc.
USB Flash Drives are small portable devices that can be easily connected to a computer's USB port. They have a large storage capacity and can store and transfer large amounts of data quickly and conveniently. Optical Discs, such as CDs and DVDs, can also be used to transfer data between computers. They have the advantage of being able to store large amounts of data, but the transfer speed is generally slower compared to USB flash drives.
Hard Disk Drives and RAM are storage devices used within a computer to store and access data, but they are not typically used for transferring data between computers.