When should I use Localstorage vs database?

When should you use LocalStorage?

Local storage provides at least 5MB of data storage across all major web browsers, which is a heck of a lot more than the 4KB (maximum size) that you can store in a cookie. This makes local storage particularly useful if you want to cache some application data in the browser for later usage.

Is it good practice to use LocalStorage?

It was designed to hold key/value pairs as strings, not store secure data! However, if you want to be able to save an article on Medium or store a draft of a story, LocalStorage is pretty good for that sort of information(unless you're writing your next hit novel and don't want it to leak)!

What are some disadvantages of using LocalStorage as opposed to a central database on a server?

Here are a few reasons, however, to reconsider the use of local storage.If a site is vulnerable to XSS, LocalStorage is not safe. Perhaps the biggest objection to the use of local storage is the security vulnerabilities associated with it. ... Developers have no control over the locally stored data. ... People clear their caches.Is LocalStorage safe to use? | Snyk

Is it better to store files in database or filesystem?

Advantage of the File System over Data base Management System is: When handling small data sets with arbitrary, probably unrelated data, file is more efficient than database. For simple operations, read, write, file operations are faster and simple. You can find n number of difference over internet.