Iconia W3 - 810 Windows 8 32gb flash memory

From SEARCH you can type DISKMGMT.MSC and this will show you how Disk 0 (the 32GB main memory) is partitioned.

Then enter explorer.exe into search, right click on the C: drive and select Properties. The overal size should match the C: drive reported in DiskMgmt

To find out where the space is going you can open a DOS box and try a Dir/s/a/ > dirfil.txt and you can search for large files.(note the result will be a multiMB text file and take a while to create) In the top directory you will probably find multi-GB files such as hiberfil.sys and pagefil.sys. You will also find a very large directory under Windows, winxsx, on my W3-32gb it has over 40,000 files and occupies over 6GB.  

For an explination of the WinSXS directory see http://blogs.technet.com/b/askcore/archive/2008/09/17/what-is-the-winsxs-directory-in-windows-2008-and-windows-vista-and-why-is-it-so-large.aspx but basically this contains everything Windows needs to create itself and all of its APPs. Not to RUN apps but to CREATE them.The more apps, the bigger it is.

So if you need to there is a lot of tuning that can potentially free up about 10GB of space on Drive C:. That said I just use 32 or 64GB microSD cards as Drive to store all data such as over 7 GB in a MUSIC directory or 7 DVDs in VIDEO.

It is up to you.

ps by buying the 32 GB model you received the recovery DVD. On 64GB models that is all in a 6GB Recovery partition.

Everyone's needs are different however I freed up about 3GB by turning off Hibernate which removed the Hiberfil.sys file and lowered the Pagefile.sys to 500 MB.

You can also use the drive> properties> Disk Clean up > Clean up System Files to remove older files that are no longer needed. (will take a few minutes to calculate)