Over the years, I've morphed from storing mostly in quart Mason jars to pints and even half-pint jars. Now, when I buy a pound, I generally put into two pint jars and perhaps one 8 ounce jar (depending on the cut of the tobacco and how tight I pack it). One pint jar gets packed into a box with other blends, sealed, and labeled, "do not open until ten year from the date I seal it, so I know almost half of what I buy is in long term aging. The second pint jar I usually keep around, but may not open it for a couple of years. The smaller half-pint jar is for sampling over the next few months.
I now have several good sized boxes labeled, "Do Not Open Until 2011, or 2012, or 2013 (up to 2019). So at least 8 to 10 pounds of 10 year old tobacco can be opened each January first for a while to come. That's the primary reason that I never post pix of my cellar, it's not all neatly stashed and arranged by brand or blend, but packed into sealed boxes and stashed all over the place.
But to answer your question with my experience, store in several, smaller jars rather than fewer larger jars, they you can open some and leave others to age.
Natch