I do it every day - I have a program set up to automatically copy and sync a file from a password-manager (encrypted of course) to other harddrives on other computers. So I have several harddrives on several computers and also external harddrives with the same files. And also some usb sticks.
I'm also planning on adding a cloud backup of the same files. Then I will first encrypt the password-manager file with a (>128 bit) password on an airgapped computer running a live-dvd of linux. I also use the same airgapped setup when accessing my crypto cold-storage.