>>Yes, in Windows Explorer chose Details view and order by Size descending (also it allows to filter gigantic files, etc.). I found that in my case the biggest file is pagefiles.sys
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>>I'm not sure what information is stored there.
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>I meant the entire drive in one command. Is that possible to list all files from the drive in the same window?

I'm not sure there is a visual way to list all big files. There may be XDIR utilities from the command line. Also, it's easy enough to write a recursive program to get size of files, there is one in Downloads section here you may use File #25487