These 3½" & 5¼" Floppy Disc Drives are not the original Amstrad standardyet the media and drives were far cheaper so they were common especially when used as a 2nd drive.
Yet they During the lifetime of the CPC both drives were far cheaper advertised in UK magazines with the 3½" becoming much more common in it's later years due to it's use in the PC. In Germany 5¼" were advertised and are nowadays easier well supported by Vortex for much longer. Magazines also promoted the use of these drives especially with the use of another DOS or C/PM to be able to usetheir full capacity.
Especially the Both 3½" as these disk are still available in some retailers. You can also easily find such & 5¼" drives in any garbage if you properly scavenge old rusty computerswere often double sided and supported double density and high density although the Amstrad could only support Double Density.
These Disks couldn't Nowadays the 5¼" drives are hard to find and are expensive, media is not made anymore and new-old-stock media is also hard to find. The 3½" drives can be side switched manuallyfound from old PC computers and there is still a read supply of new-old-stock media.The older models used only Increasingly however it is often easier to use a disc drive emulator or one side of the devices that can run games from SD cards. ==Comparison of media costs== 3" disc (360 KBeach)- £3.99Double side 3.5" disc (DDeach) - 50p5.25" disc (each) - 50p ==Usage of Media== To make full use of the capacity of the media you need to use another DOS or even High Density were availableC/PM on your CPC which can support more tracks and two sides. Then you can use around 720KB per disc. Without another DOS you can still use some of the capacity: * 3½" discs can't be turned like 3" discs therefore with [[AMSDOS|AMSDOS]] you can use a manual side switch to choose the sides giving 2 x 178KB per side. Without the side switch it's just 178KB. Using discs like this back in the day was still useful as the media was cheaper. * 5¼" discs can be turned over like a 3" and you can write both sides if you cut a write protect hole on the other side of each disc OR like the 3½" a manual side switch can be used.
[[image:3.5.jpg|200px|thumb|Internal 3.5" drive]]
[[image:5,25_cable.jpg|200px|thumb|advertisement for 5,25" drive cable for CPC in 1990]]
==Formats Scavenged 3½"==
3It is worth noting that 3½"1/2scavenged from PCs will lack the drive selection and ready signal. Often these drives will need a modification to make them useable OR you can make sure the drive motor is always on.
*DD = 720KB*HD : 1,44 MB=Common PC Formats ==
53½"1/4:
*360KBDD = 720KB *HD : 1.2MB,44 MB
5¼":
*DD = 360KB
*HD = 1.2MB
== Beware : HD ==
Nowaday, only HD 3the most common 3½"1/2 disk is HD. These can be found at good as used or new old retailer'sstock on auction sites.
But or our beloved CPC can't understand easily the concept of High Density Disk with 1,44MB available... so you have to cheat to use the media: just put some opaque duct-tape (scotch-tape, whatever...) on the HD Hole.
So you have to cheat : just put some duct-tape (scotch-tape, whatever...) on the HD Hole.Tada, a proper the drive will think DD disk with 720 KB (if your OS allows media is used and now it).Or a common 2x178KB with [[AMSDOS|AMSDOS]] (stock CPC firmware) - if you have a manual side switcher button of course to read second side of disk's usable.
PC users used to do the opposite : file cut/drill a HD hole on DD disk...this worked well sometimes.
You can also modify your HD drive to behave as a DD one (but this would be permanent of course).. Check for appropriate jumpers on your drive!
*any scavenged rusty junk may be good enough nowaday, if you have a 664 or 6128...
== Connections and Wiring ==
[[DIY:Floppy_Drives]]
== Guides ==