Vista - Backup drive shows too much used space

I do weekly full backups to an 300 GB external USB hard
drive with the built-in Windows Vista backup program.
On my entre C: drive I've only used about 100 GB, and
this of course includes both the OS, apps, and user data
files.

I just looked at the J: backup drive in Windows Explorer
and the pie chart of Properties is showing the Used
Space as 200 GB which really surprises me. I don't get
this. On this backup drive there's only a single parent
folder called RICK. The Properties of this folder shows
only 21 GB of files. Yet Properties of the drive itself
shows a pie chart of 200 GB Used Space.

Something is taking up a lot of extra space on the
backup drive and I'm not sure what it is.

I did a Disk Cleanup which found a Recycle Bin that
hadn't been emptied out, but that only released about 15
GB.

If this is any clue: before doing each full backup I
manually delete the previous week's backup from the hard
drive.

Any thoughts? Thanks for any help.

"Rick" <rick0726@newsgroup> wrote in message
news:MPG.2517f2ea815375f3989914@newsgroup

What Norton product are you using?

--

Richard Urban
Microsoft MVP
Windows Desktop Experience

Hi -- I'm not using any Norton product. Never have.
Why?

In article <#5vGglXNKHA.4028@newsgroup>,
richardurbanREMOVETHIS@newsgroup says...

Some Norton products do, or used to have this "Protected Recycle Bin" thing,
which is hidden, and could be the cause of the reduced disk space you're
seeing.

I no longer use Norton products but I know that some years ago their
"SystemWorks" type suites used this protected recycle bin thing, perhaps
their latest security products still do.

"Rick" <rick0726@newsgroup> wrote in message
news:MPG.2518b9fc43c58f78989915@newsgroup

Thanks -- no, I've never used Norton products.

Any other thoughts about what could be hogging disk
space invisibly?

In article <OC$SbkaNKHA.2036@newsgroup>,
admurray.antispam@newsgroup says...