preparing my old win 7 system for tranfer to my new PC

Hi all,
after years of building my own PCs I decided that I would treat myself to a good 'un and I assembled my wish list earlier this year. I was going switch to an ASUS Sabertooth mobo with an FX 8370, 16 Gb DDr3.
But when this failed to even post I swapped it back to my regular Asrock mobo supplier of choice and bought an 990X Extreme6 - which worked straight out of the box. Kudos to Amazon though - no messing about and refunded straight away.
Anyway I digress.
I've done a clean install of a new copy of Win7 pro ( no attempt to badger MS into reactivating my OEM copy of win7 from my old machine) and as I have a lot of software installed on my old machine I decided that an inventory/audit was required . So this tidy up is a vital operation before commissioning my new PC.
What has puzzled me is that Windows Easy transfer reports just over 100GB of data to transfer. 43.2 GB from my admin user account and some 60GB from "shared items".
As I only have the one user account this is odd. I looked at the advanced tab details which yielded the stark fact that this 60GB was mainly "other items" and I can't for the life of understand what all this garbage could be. But this doesn't help me to clean up my old system because I don't know what I need to delete/purge. My question is, therefore - how do I establish the content and it's location and equally , if it's not personal user account data but windows crap , how do I know whether or not it can be deleted.?
regards
Dave Hickman

All you have to do is copy your personal datafiles, without the crap.
Don't use the tranfer, cause it copy's about your whole pc. (for instance useless system backup)
With outlook you just transfer the PST file.

You can use https://antibody-software.com/web/so...ur-hard-drive/ (portable version link is there too).
Scan your C partition and track down what's taking that space.

Thanks for your kind replies. I have used easy transfer for my own single user account, as the possibility of missing something vital otherwise is all too obvious. The question I asked was quite specific though and in it I referred to the shared items element of Easy transfer, This was huge and bigger that my own user a/c related data. Needless to say I didn't opt to transfer this information when carrying the exercise out yesterday. Wiztree , like treesize free , isn't much help really as the owner/creator of folders containing 100's of un identifiable files is patently Microsoft inspired. But what on earth they are for - well, who knows.
A clean install of a new win 7 pro has taken things back to a known baseline and I shall be a little more prudent this time.
regards
Dave

If you used WET (which an fail) it transferred in AppData that is a corruption path into a fresh install.

I would do the install over this time following Clean Reinstall Windows 7 which compiles everything that works best in tens of thousands of installs we've directly helped with here, and has been used by over 1.5 million consumers without a single complaint. They have the best install in the world.

Using XPired methods with drivers can also cause performance problem in a driver-complete OS.