How to add a drive to a desktop computer case?

How to add a drive to a desktop computer case? pc case with optical drive slot I just looked at a case that will hold 18 fans! But, no optical drive slot in that 27” tall case Tell me how that ” slot takes up too pcie x1 in x16 slot Phantek, a competing case manufacturer sells a 2-bay ODD cage that is an upgrade for their tower cases You still need an external CD

pcie x1 in x16 slot Hi, i'm looking for a modern case that can house a optical drive, since it has become much rarer with time; Preferably = 100€

pcie slot sizes Can I use a 9mm thick slot loading drive with this case ? The optical drive FC10 – Fanless ATX DB1 – Fanless Mini-ITX FC5 Optical Drives, PC Case, PCIE Wireless Adapter, Pen Tablet, Portable SPECIFICATION Case Size Mid Tower Motherboard Support ATX Drive Bays 4 x Bay