Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: What Size to Format to ?

25 Dec 2010   #1

Windows 7 Ultimate 64 - OEM Service Pack 1
What Size to Format to ?

I just got a new USB Stick from Santa this one here

Sandisk Cruzer Slice 8GB USB Flash Drive - Computing at (UK)

I popped it into the PC and saw it was formatted to FAT 32 So I decided I would format it to NTFS when I come to format it it gives me the options of Allocation Unit size with several sizes to choose from can anybody please tell me which is the best size to go for ?

Choice are :
Default Allocation Size
512 Bytes
1024 Bytes
2028 Bytes
4096 Bytes
8192 Bytes
16 Kilobytes
32 Kilobytes
64 Kilobytes

Happy Holidays


My System SpecsSystem Spec
25 Dec 2010   #2
The Howling Wolves

Windows 7 Home Premium 64bit

I would think the size would depend on what you are going to put on the 8GB stick!
Pictures, music, or documents?
My System SpecsSystem Spec
25 Dec 2010   #3

Windows 7 Ultimate 64 - OEM Service Pack 1

Good Point :) I use it for mostly transferring music. IPhone/Ipod format.

My System SpecsSystem Spec

25 Dec 2010   #4
The Howling Wolves

Windows 7 Home Premium 64bit

With an 8GB(Lots of room) then transfer it to the best quality you want. Besides you will be updating, deleting and all kinds of crazy stuff.
I remember when HD's for pc's were that big.
So test it out as you can always format it to something different.
Have fun with your new present.
My System SpecsSystem Spec
25 Dec 2010   #5

Windows 7 Home Premium x64

If security is not an issue, you might consider using exFAT instead of NTFS.
It was designed for thumb drives and doesn't carry the overhead that NTFS does.
I know this doesn't answer your Cluster size question, but it's something to think about.

Speaking of cluster size-
In the old days, Norton Utilities had a slack space analyzer that would show you what the optimal cluster size to slack space ratio should be based on your current disk usage.
Does anyone know of a current utility that will perform that same function?
(I don't mean to bump here and if this should be in a new thread, then somebody holler at me please.)

My System SpecsSystem Spec
25 Dec 2010   #6
James Colbert


The default cluster size (and most efficient) for NTFS is 4kb (4096), but really, unless you are planning on transfering files over 2GB, there's no reason to go with NTFS. FAT32 should do nicely and can be read by most OS's (except really old - 16 bit - OS's).

Also, here's a link of interest that really puts a USB key to productive use!:

Boot Multiple ISO from USB (MultiBoot USB) | USB Pen Drive Linux

My System SpecsSystem Spec
25 Dec 2010   #7

Windows 7 Ultimate 64 - OEM Service Pack 1

Ok many thanks Guys I will leave it as it is.

My System SpecsSystem Spec

 What Size to Format to ?

Thread Tools

Similar help and support threads
Thread Forum
Question about format cluster size
G'day, I've been experimenting with EASEUS Partition Master Home Edition and a spare 500GB WD 5000AAKS external USB disk as part of my self education. Specifically, I've been experimenting with cluster sizes after reading this in the EASEUS help file: EaseUS Partition Master Manual -...
General Discussion
USB Cannot Format and Size Reduced from 32GB to 8MB
HELP !! I cannot format the my 32GB USB . I already tried HP Tool. Please see picture attached;
Hardware & Devices
File format changed into other format after format a hard drive
Hi everyone, I recently accidentally formatted a hard drive. So, I quickly install a file recovery software (EaseUS Data Recovery). Then the result shows that most of SWF files are big in size. I think that lots of my files have been converted or combine with other files. So, how do I recover my...
Hardware & Devices
32 GB flashdrive became 8 MB in size after format.
I have an issue and I hope someone can help me. My 32 GB flashdrive shrink and it became 8 MB in size. Tried the Fat32formatter but was prompted to a message partition collapsed. Checked the disk management but there is no unallocated size. Also tried the disk part but only one disk is being...
Hardware & Devices
Unable to format NTFS partition w/ allocation unit size of 512B
This is an issue with trying to use the Windows Backup utility with an external hard drive (Seagate GoFlex Desk) with more than 2TB of storage (in this case 3TB). I have looked into this and found that this is a common problem related to the backup utility being unable to deal with drives that have...
Backup and Restore

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 17:49.
Twitter Facebook Google+