of those manufacturer supplied filters are of dubious quality and are quite often difficult to change, mid-season, if required and can be a mess when you need to.
Mine was, also, in a drawer and I took it out and deposited in the circular file which is picked up weekly at the curb
In my 210WBS, I set up a whole house filter assembly and while it did an excellent job at filtering all the water that I used (I filled my fresh tank with water run through it also), it, too, proved to be a hassle.
Fast forward to the current rig. I use one of those simple blue in-line KDF filters available everywhere to filter all the water coming into the rig. It takes out the big stuff and 90% of the little stuff along with a lot of bad tasting crud. Easy to change (I carry two spares) when needed as they can clog fairly quickly in some areas of the country and a clogged filter can seriously affect water flow, as they go between the hose and the trailer. I filter all the water that is used with it, even the tank flusher just to keep the big grit out of the "works". For drinking use, I have a Pur filter attached to the kitchen faucet. It filters all
the stuff out; tastes just like bottled water. It, too, is easy to change and has an indicator to show when it needs changing. When we cook, when we want a glass of water, etc., it comes from the Pur filter.
IMHO, FunFinder (and Keystone) did me a favor by not installing the filter...there are much better alternatives available that are easier to service and do a better job.