Retainers are meant to go from 150 to 100 and Self from 200 to 100 last I recall, overflow items I imagine would probably go into some sort of stasis storage, limbo as it were, until retrieved. Anything acquired after november 1st just wont really exist after the 10th at all, as far as that goes.

But here's a different thing - You have 2 full months to get those numbers down so you dont have to worry about overflow storage or the unfortunate circumstance of items being lost in transition as they drop inventory levels for yourself and your retainer. Get stuff repaired, toss it in your armoire, get stuff sold (try changing your prices maybe?) and just stop being a little hoarder lol Back when AF was about to release I did this same thing, went through my main retainer and started to liquidate random materials and gear I most likely wasn't going to reuse in the future after AF's release, currently sitting around 50/150 on one retainer, 90/150 on another retainer (so much freaking lvl 1/2 materia..ugh) and my own personal inventory flucuates often just due to random drop loot. But anyways, what I'm saying is, you have two months to manage your inventory.