Hard drives only in the base 21 5 imac and mac mini ssds and fusion drives.
Flash storage vs ssd mac.
The capacity of ssd storage will be lower than the hdd storage.
The working process of fusion drive is based on your own usage patterns.
Each of them has its pros and cons.
An ssd has flash storage inside but ssd is a special form factor in most cases meaning that it is designed to fit in places that a normal 2 5 hdd would be installed.
Most ssds solid state drives are made mostly of flash memory like an omelet is made mostly of eggs but flash memory can be.
Ssds use a form of flash memory to read write and store data but flash storage is not necessary to be ssd.
Ssd is expensive but the performance is spectacular especially since has apple incorporated pci express pcie based flash storage.
The choice apple offers the 13 inch macbook air 2020 with 256gb 512gb 1tb or 2tb of flash storage.
If you go with 2tb however there is an increase to 128gb flash storage.
Flash comes in a huge range of formats from tiny cards for phones and cameras and in macs it can be an ssd msata and pcie form factors.
Flash storage or flash memory is the eggs parts of the analogy.
Macs are currently sold with three types of storage devices.
If you check the late 2015 imac of 1tb fusion drive you will spot 24gb storage.
Pay for as much as you can afford but see what you can live without and try to save yourself some money.
Ultimate performance for professional users flash storage devices are the new kids on the block whilst they are essentially ssds they represent a huge jump in performance over their sata limited relatives.