How to handle attachment in a new forum?

[NHUN]

Hi Guys!
Im NOT an IT guy, but I know when it comes to attachments its better to prevent any issues, before we activate a new site. So how should i prevent the big file sizes?
Im open to paid method (that would save money and headche on the long run). SO how should I handle attachments?
Amazon S3? Bunny net? Cloudflare? Any other suggession?

As said Im not an IT guy, so if you recomment me anything, please do send me a link how should I set it up.

Thanks in advance!
How to handle attachment in a new forum?

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