What guide did you follow on wiihacks.com?
Yes, you can move the files to your PC.
Apps in DOL-format you can put on your SD card under the apps folder (sd:\apps\yourprog1\boot.dol)
And your WAD-files you will need a WAD Manager to install with. apps i WAD format will be installed to Wii memory
No, you don't need Connect24.
HomeBrew don't use Connect24
Wii can't handle USB3, only USB 1.1 and 2.