This might be a stupid question...FTM. Storage bags and breast pumps

Rachael • 20 y/o. proud mommy to be🎀💅🏼

So I'm breast feeding so I'll be needing storage bags/breast pads, the whole deal. My insurance company sent me an Ameda breast pump..however I haven't been able to find anything at target or Walmart for the ameda brand. Can I use any brand storage bags & if so what's the best/affordable ones?