Our first bit of advice on New York City self-storage might preclude you from reading the rest of this article: try not to use it. It's expensive, moderately inconvenient, and not all that helpful. If you cannot afford an apartment that fits all of your stuff, strongly consider parsing down what you need before you move. If that doesn't work, consider storing your possessions outside of the city (which will be much less expensive). Will Mom and Dad let you keep some stuff in your old bedroom? Or perhaps Grandma has some extra storage space in her attic? Explore those options first. if you insist on having your spare possessions within walking distance, we can give you some key information.
Although you can't sleep in your storage unit, expect to pay those kinds of prices for the space. Closet-size rooms start at about $50 a month, while bigger rooms quickly scale into the $300-500+ per month space. The good news is that there is a decent amount of competition for your business, so if you shop around you may be able to get a better deal for the first few months. Watch out though, expect to see rent increases after that introductory period and potentially consistently throughout your lease.
With that in mind, you can also find a couple of move-in perks depending on how much you're spending on the space. Many companies will throw in an hour or two of free moving time including a truck and movers. Some companies will let you downsize your space if it becomes apparent on your move-in day that you a more efficient packer than you originally thought. Others will just do the whole thing for you, including taking inventory, moving your stuff away, and packing it in your unit.
As an alternative to self-storage, consider a donation to the Salvation Army. Instead of you having to pay thousands of dollars a year to store your extra stuff, they'll give you a tax-refund. We know that there are some cases when you just can't part with your belongings, and in those instances, self-storage can be a great alternative.