Be careful with generic brands of those, especially chineseium made on amazon. Honestly, I gurantee you should buy the Food Saver brand, especially at Sams or Costco if you have a membership. They are so much more reliable.i picked up a vacuum sealer at goodwill that looks basically brand new. we'll see it if functions, but it was $3.99. ordered two rolls of various bag widths on amazon prime and they got here yesterday.
i've got 4.5 lbs of jerky that i usually just put in big jars and don't bother sealing since i eat it quick. but i'm going to try the vacuum sealer. not to keen on using plastic bags, even if vacuum sealed, long term versus the xenoestrogen glass, but if it works and i can reliably get lots of storage out of it....probably isn't going to work for liquids, so anything dry i may be vacuum sealing from now on instead. there's a LOT of bags on this roll, and i can use the machine to cut the bags to fit. seems like a lot of storage; hope it works.
Good luck and best wishes to you.