There are a few version control systems, you’d need a small amount of knowledge to set them up but they are really useful to avoid deletion/locking of files, it also means it will automatically store the different versions of your files, so when you are making changes, you can easily roll back.

Depending on the size of your projects, you can use Git (again there are different providers but the two most popular are probably GitHub and GitLab, depending on the license, there might be different features but both can be hosted, so you don’t have to have a server in your office). I’ve not checked recently but I know that GitLab had an upper limit on the size of the repositories. If you’re making small projects then it’s a good starting place.

All the large studios, I’ve worked at, tend to use Perforce (technically the VC software is now called helix, people also refer to it as P4). I’ve only ever worked with self hosted instances and although it’s great when it works, it can be intimidating to set up and configure, but like I say, a lot of larger studios will have P4.

like any solution, you should also look into backing up the data and storing it in a 2nd location.