Hi Anon!
There is literally a ton of resources out there, from case compilation hard-copy books to amazing online/PDF versions which are free to download.
I think the bigger challenge is to prioritize, and to get the actual interview practice - I recommend 15-20 live cases, as both interviewer and interviewee - going. That is the key to your prep, together with some talent, preparation, frameworks etc - and way more important than the number of cases you have read. Obviously, myself and most people who went into consulting here have probably read fewer cases than you already :)
One example for a useful online PDF is the Wharton casebook, which you will find via a google search or through this link:
Unicloth (careerinconsulting.com)
Best
Stephan