Those camera storage discs have flash memory. Flash memory is considered very reliable. One aspect why this medium is reliable is because it contains no moving parts, unlike a hard drive. Flash media is not perfect though and is susceptible to overheating, freezing, and electric damage.
Yes both are secondary storage devices. Primary storage devices include RAM & ROM. Secondary storage devices include magnetic disks like hard disks and cds(optical disks)
"Permanent storage", because the data does not disapear when the power is turned off.
Secondary Storage
the hard disk drive is considered a nonvolatile storage device
Permanent storage device such as a hard drive.
Miniature hard disks have storage capacities that range from 1 GB to 320 GB.
Data storage.
Audio
Floppy disks
Yes. Many of the first digital cameras stored their photos on floppy disks. A floppy disk may not be able to store a very high resolution image, however.
A storage device is any computer hardware meant to store data permanently or semi-permanently. This includes, but is not limited to hard disks, floppy disks, cdroms and DVDs.
Magnetic