Finding videos can be a pain if you don't know your way around your specific operating system. If you want to copy videos a CD/DVD or store them on a different device you first have to know the correct location.
Think of it this way. You have a cabinet that contain files. You want to move them from one place (the camcorder or memory card) to another place (the computer).
On Windows computers the cabinet are disk drives that have specific names and drive letter designations.
The Naming of the Disk Drives
Back in the day computers were simple and identification made sense in a Microsoft DOS kind of way:
A: First floppy drive (On new computers we don’t have that anymore.)
B: Second floppy drive (Ditto)
C: First hard drive, usually the primary storage drive that has the operating system, application and program files.
D: CD or DVD Drive.
E: External hard drive.
F: to Z: any additional drive that are attached or a virtual or network drive.
That is (was) the traditional standard disk drive structure. With the addition of memory card drives, 2nd internal hard drives and USB devices that can be added and removed you can have an alphabet soup of drive letters.
On my system that looks like:
C: First hard drive.
D: Factory_Image A virtual restore drive set up by the manufacturer.
E: DVD RW Drive
F: Removable Disk (SD Memory Card slot) that currently has an SD card in it.
G: Removable Disk (CF memory card slot)
H: Removable Disk (MS memory card slot)
I: Removable Disk (XD memory card slot)
J: External Hard Drive
K: 2nd Internal Hard Drive that I have re-named Pookie
Your system will be different but if you can identify the C: drive you can find the other disk drives.
If you have removable USB devices like external memory card readers or you are using the camcorder as a drive device (you can do this if your computer has the correct drivers for the camcorder) then a new drive letter will appear when the device is connected.
It could be L: M: Q: it depends on what you have on your system.
You can take a look at your system by using the Start Menu and then selected My Computer or Computer to enter the Windows Folders file system.
Practice this before you decide to transfer videos so that you know exactly where your files are located and where you want to copy or move them to a new location.