Agree. Nevertheless, If OP insists on digital backup I would advocate for industrial grade SSD card (in micro or micro format) instead of ordinary USB flash drive. Those cards have an incredible life span, are less damageable and much easier to hide (or carry in the course of relocation) than bulk drives (even of 2.5" size).
Flash drives are smaller
Flash drive and SSD cards are almost using the same technology
They both have the same life span. Depending on usage and maintenance
SSDs are bigger, but with larger memory and faster
Flash (with small memory) are cheaper
Just for wallet file backup or seed phrase extended with passphrase backup, flash is better.