The only place where you can store files without fear of censorship is on your own local physical media. Which can be CD, DVD, Blu-Ray, external hard disk, USB sticks or SD cards. Though in my experience only optical media will truly endure over time, because USB sticks, SD cards and SSD drives loose their charge over time and need periodic refreshes to hold the data saved; and traditional HDD are susceptible to mechanical failures due to vibrations, impact and/or temperature.

On top of that it is worth to save files on at least two or three archival media. Either multiple copies of the same media type, or multiple media types. Though if you can afford it, doing both would be a good insurance policy.

In my opinion, SSD medium is good while you are processing your files for storage and archival.

But I would most definitely stay away from any kind of so-called cloud storage on the internet. For one, your files are gone as soon as you stop paying the monthly rent (a.k.a. subscription fee). For two, your files are gone if the provider goes out of business, gets bought out by a competitor or simply decides to discontinue the service. For three, your files are never really secure from third parties (be that government surveillance, data pirates or malicious hackers) as long as they are stored somewhere on the Internet or directly accessible over the Internet. For four, some cloud storage providers have buried deep in their very small print and high verbiage legalese that can use use your intellectual property for their own profit without having to acknowledge you as the source, much less paying you a license fee. For five, many online cloud storage providers have censorship clauses buried in their user agreements, often deep in the fine print.