I have been using multibit wallet for years storing the roaming/multibit folder on a backed up usb key and transferring to and from my laptop when i need to use the wallet this works fine but every time i copy the folder to my laptop and start multibit it takes time to resync this time takes longer and longer and I have now found that multibit is no longer supported/updated so i need a new wallet

I want a wallet that will let me store the wallet.dat file and the blockchain (or whatever it is i need to sync) on an usb key

can anyone tell me which wallet will let me do that

cheers