Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: What is the size of the drive needed?
Document: All of this full size gear still left room for an optical drive and two hard drives.
Purchased this case since a full ATX build would not fit on my desk . Assembling was a small bit of hassle. If you are going to use a full size graphics card, then you have to remove the optical drive bay and the top hard drive bays, it just won't fit.
This case is a absolutely magnificent. It provides everything that you would expect, and then some. First of all it shipped extremely fast, at a total of two business days, and I chose standard shipping. On a different note it is very important that your components are properly ventilated, and this case allows everything you will need in terms of cooling. It even includes the option to install a water cooling system, despite its size (In order to do this you need to remove the optical drive bay).
I like how the limited size forces you to plan your build carefully but also leave out unnecessary stuff (i.e. optical drive).Cons:1-  tight spaces = you have to be careful picking your components ( especially your power supply + GPU Video Card = use &#34;Part Picker&#34; & tech forums to make sure your bits n bobs will work together in this case). You need to assemble + re-assemble to complete a good clean build.
This case looks good and is compact. I squeezed everything I needed into this baby. The only problem is the handles which are made of plastic, making them feel fragile and flimsy.
I'm super happy with this case, good looking and high quality, absolutely worth paying a little more for a higher quality product.pros: this case has a ton of configuration possibilities, plenty of room for even large video cards. no tools needed to install almost everything.
At first I wondered if this case would be too compact but after packing in the Gigabyte Z87 Mini-ITX motherboard, and the Corsair H80i liquid CPU cooler H80i, i was pleasantly surprised to see everything fit quite well. The CPU cooler did require removal of a rear case fan, (it has two of its own)  however you can relocate that elsewhere if needed.Just be aware that some larger power supplies might be tight but I used a Corsair HX650 and it fit fine.
I believe this is standard for this size board, so plan on buying an adapter if you want more fans.Putting it together wasn't completely clear, either.
First time builder and totally excited about this case - mistake was on our side- motherboard and graphics card were too big for this case.Wish this design was available in a mid size case.
Very sturdy nice case, I love the white color as well as the size, it literally is half the size of my previous case and has good ventilation (Arctic white). I do have one complaint. The company (BitFenix) has poor customer service.
Answer: Any 2.5 or 3.5" drive will fit.