Is additional memory required for the service worker to work?

Question

JavaScript

It is planned to create a PWA on React, which allows you to send a large number of files, approximately up to 100. And each file weighs 10 MB.
There is an input file. We open a native window and select all 100 files. The browser fixes their location on the phone. Memory is not consumed by this, is it?
If, for example, the Internet is lost while sending files to the server. Then the sending process is suspended and the service worker tries to send again at certain intervals.

Question - does not need additional memory on the phone to work? Shouldn't I use Indexed DB for this as an option?
Perhaps the sending process should be built somehow differently.