Electrum wallet is a SPV wallet. Simplified Payment Verification wallet is a wallet that does not need to run a full node to receive and send bitcoins. It is light enough to use on USB stick.

Electrum: https://electrum.org/#download. You can use Portable versions but must read Security Advice.
Warning about portable versions

[Guide] How to Safely Download and Verify Electrum

If you use Electrum wallet, have questions, you can ask in Wallet software (Electrum).