On a USB stick keep only 2-3 truly critical documents that may be useful during a blackout with no power or internet (for example a scan of your ID and your most important policy) - and be sure to encrypt it (e.g. VeraCrypt or hardware), because a plain stick with a full set of scans, once lost, is a ready-made identity-theft kit. It is better to keep the full set of documents organised in Sejf Życia: the stick shares the fate of the bag, whereas an encrypted vault accessible from any device does not.
Put your most important documents in one secure place
Sejf Życia is an encrypted space for documents, access details and instructions for loved ones. Only you decide who gets access, and when.