Hello
Pardon my spelling as English is not my main language so allot of technical stuff about BTC evades me !
I'm new to BTC only started reading and investigating on it for a week or so. I've got a wallet that's still syncing after 4 days is that normal?
From your post, I assume you are using bitcoin core.
For the initial sync, you need to download 22 GB data and so it may take more time if you have not so much bandwidth.
You could use the bootstrap torrent to speed up the download process.
And you could use thin clients like Electrum or Multibit, and you don't need to download the full blockchain data.
There's not option to restore backed up wallet.dat in any of the clients I have so do I just copy paste it from my usb keys after installing a fresh client on the new computer? also I've renamed the wallet.dat on the usb's do I have to rename them back to wallet.dat?
Yes and Yes.
You just need to paste the wallet.dat file to your bitcoin data directory.
If you renamed the file, you need to change the name back to wallet.dat.