Run a Drupal website offline (±without server)? --- E.g. hand it over on a usb-stick / by mail? --- Run it from the HD, while retaining functionality?
Drupal is too large a project to be run on slim architecture or dumb terminals. If you're going to buy a USB stick (memory) to store Drupal then buy a "computer stick" and run Drupal off of Sqlite on the stick, for example a Gumstix product with Ubuntu on it $200 USD is hardly more expensive then an expensive large USB memory stick. https://store.gumstix.com/index.php/products/283/