Some people, namely codegang, have tried doing that (and it fails for many reasons).
Unfortunately if repl.it is blocked for you there is NO workaround for ANY Cloud Variable System.
The OP said they wanted a way to make storage.
Uh...no?
@bluebaritone21
Yes?
They want CLOUD storage, not just any type of storage.
Oh. Hmm...
Snap! was never meant to have any cloud variables, even MQTT has failed because it's not really a Cloud Variable Service type of thing. It only sends and receives data through Internet Connections. Useful for Cloud Games and Chats (which are discouraged) but nothing else.
Hey, I think that's what OP wanted.
EDIT: No, OP didn't want MQTT.
Fiiiiiiiirebaaaaaaaseeeee. 
if you have a raspberry pi or something like that sitting around you can make your own server at home as well
hopefully for christmas or my birthday i'm going to get a raspberry pi and i could try making a cloud server on it
"cloud variables" can mean a lot of things to lots of people.
It's relatively simple to run a server on the Internet and then let people save and retrieve information from it.
It becomes much harder to do that securely
To enable Snappers to read each others variables securely requires the server to be run by the Snap! team as they are the only ones that can securely verify who people are.
I used mqtt to create a cloud database system
it works just like cloud variables so I think it could help
Link
also it doesn’t require a server so it works quite well
disclaimer:
because it’s in its beta it doesn’t have good safety so anyone who knows the database name can edit it but I will fix that in the future
I'm saying this as someone who has written a lot of not so good code (quite a bit in the last 13 days actually trying to solve Advent of Code puzzles) but your project doesn't work "quite well"
Quite a few of us have pointed out some issues with it 
But I wouldn't recommend it as a starting point for someone else making a cloud database server using MQTT
I know it has many issues
and I’ve been trying to fix as many as I can
he wanted something that works like cloud variables so I gave him something that works like cloud variables
With the ability of MQTT brokers to "retain" messages, you could use this library based on @cymplecy's forum post. As always:
I use the retain function
uh, yes... i did say that
i don't get why you're saying no based off the first post
you didn't read the other comments?
well, i could use the libraries... but i'm really just trying to learn to make a cloud library myself because imo it's a really interesting thing to work on
i've actually seen this project before! honestly i forget why i stopped trying to use it... or even look over the code to see how it works, most likely how i originally intended to...
sadly i can't afford anything right now...
well, it's an answer to my question... so i did kind of want it
even in the original post, i said:
and besides, i've already been trying to work on a set of blocks that works with both the MQTT library and the database library
really?
why not? imo from looking at it, the library makes it seem relatively simple compared to using actual cloud servers like cloudflare or replit...
that doesn't sound right... it doesn't sound right at all...
that will not work great, mainly for security reasons, and some issues you have to circumvent. it is also better to host your own mqtt server so you have more control over it, but that's you choose.
@codegang has not fixed any of the issues mentioned on their topic (again, problems with security and malicious use)
well yeah, i understand that literally anyone can find out what the name of the topic you're using in one project is, and can connect to it from another... maybe i'll try to find a way to fix that, but for now i guess i'll deal with it, especially because of the fact that the project isn't even finished yet.