You bet! Make sure you keep your wallet.dat file somewhere safe, and preferrably a couple redundancies. It is what you would use to import the xpub into another wallet if you switch devices. It is also absolutely essential in order to recover your funds should you lose one of your keys.
Discussion
A wallet.dat file? Somewhere safe like an external hard drive? And where would I even find that file?
Depends on what wallet software you used to create the multi-sig. But yes. An external hard-drive... Encrypted on a cloud drive... In a safe-deposit box on a quality thumb drive. All of the above if you want.
No one can steal your funds using the wallet config file. They can just see your balance and create receive addresses. So it's not something that needs seed-phrase level paranoia about storing it.
And sorry, usually it is a .json or .bsms for the wallet config file.