Answer:
SSHDS
Magnetic Disks
and SSD's
Step-by-step explanation:
Flash Drives are USB Drives, these are external sticks you put into PC's and such. So these dont work internally, you have to plug them into a USB port on the outside of the machine..
SSD's and SSHDs
stands for "Solid State Drive" and "Solid State Hybrid Drive" respectfully.
You can look information up about those pretty easily to tell you the major differences between the two drives.
A Magnetic Disk on the other hand is typically refereed to as a "HDD"
or a "Hard Disk Drive"
Now all three of these, SSD, SSHD and HDD's are able to be used Externally, and they are able to be used Internally as well, with various sizes to fit in alot of laptops. It just depends on the size of the space that the laptop has for the drive. (some have 2.5" drive bays built into a drawer on the laptop for example)
Modern laptops in this time of writing are moving more and more to SSD's fully, but You can still find HDD's and SSHD's common in them.