>> Roofus and AngerWound of 360GameSaves.com released a new application to access the Xbox 360 HDD (all 3 partitions), Memcard or dumps of these, with full write support!
From 360gamesaves.com:
[QUOTE]
Here it is! The highly anticipated release of xplorer360. This is beta software and needs testing. What better way then let you guys find the bugs!

Too many features to list but here are a few:
* FULL Read/Write to 360 HDDs.
* FULL Read/Write to 360 Memory Units.
* Physical and Logical drive access.
* Support for opening of dumps of both devices.
* Backup/Restore dump options.





Any bugs you may find can please be directed to our forums.
Brought to you by Roofus and AngerWound of the 360GameSaves.com Team!

Be on the lookout for some cool hardware we'll be making available in the near future as well!
[/QUOTE]

With read and write support to the Xbox 360 harddisk and memcard it means you'll be able to share gamesaves over the internet, 360gamesaves.com has a gamesaves database and upload script waiting to be used :-)
You can connect your Xbox 360 HD on your PC via an SATA controller, the memorycard can be connected via USB (see how here or here).
The Xbox360 saves are usually in /content/// of partition3 on your Xbox 360 HD. Xbox 360 gamesaves can be transfered to another Xbox 360 console and profile, but all 'LIVE achievements' will be disabled of course (achievements are linked to the LIVE profile). A dumbed down version of xplorer360 made specially for gamesaves manipulation will be released soon which should make it easier for beginners to find their gamesaves.

Also interesting - this tool will allow you to move over your old Xbox 1 gamesaves to your Xbox 360 (they will probably have to go somewhere in /partition3/Compatibility/Xbox1/ or /partition3/H2/), something that was impossible up to now.

But of course it'll also allow you to navigate the rest of the disc, so you can check out all the stuff located on the drive, like the music stored on your drive or what you downloaded from Xbox LIVE for example (demos, live arcade, themes, videos ...).

Note: Before people try to launch crazy ideas again: No this does not allow you to copy retail games (signed for XBOX360DVD media only) to the HD and play them. It's a tool that gives you access to the Xbox 360 HD and Memcard from a PC, it does not hack/bypass any security.

*UPDATE* BUG: One confirmed bug has been found and can be harmful if not known. Do not attempt to insert a file with the same name into a folder. If the filename already exists, delete it then insert your new one. Look for an updated/fixed build soon.

*UPDATE2* From 360gamesaves.com:
[QUOTE]
With the first batch of bugs coming in, one being a bit problematic. We've wrapped all those fixes up into this build. This is beta software and should be used at your own risk until Final versions are available.

*Bug Fixes*
* Off by one error in filename length check fixed
* Recursive delete functions fixed / Delete from tree fixed
* Injection of file with same name fixed. Asks to overwrite
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Download: xplorer360 v0.9 (Beta 2)
Official Site: http://www.360gamesaves.com