Companies specialising in personal storage solutions are everywhere nowadays. As for every kind of purchase decision, your choice of the right outfit to go for should be made judiciously, and on the same basic principals as apply to most such decisions. First of all ask around. If that gives you a line on one or to companies that is a good start. Then of course, look on the internet. You can get a good idea of the general price range of the different deals and locations in this way. You will need right from the start to have an idea of hat volume of storage you will need. You will find some ready-reckoners to help with this job online.
Then when you have narrowed it down a bit, call two or three companies, to check the size of unit they recommend and to test the water as regards their customer service ethos, which is always important.
Once you have determined the volume of storage you will need, you need to think about whether and how often you need access, because the price of the deal and the location of the storage will vary accordingly. Don’t forget that if the storage is needed because of a house move, a removal company may also be a good option, as they can often offer reasonably priced storage without access when you are moving
The choice of the storage company will then be mostly though not entirely down to the price for the deal you want. Of course you want to feel that you can generally trust the company and you will get the feel of that from a phone call, and the size and reputation generally. But other than that once you have decided exactly what you want in terms of the deal, there is probably little in the way of actual expertise which you need to assess in order to make a choice.