@Vigme86 you totally forget that hard-drive capacity increasing over time and price/GB become lower over time.

Additionally if we're talking about scaling, storage capacity isn't biggest problem. Internet bandwidth, internet latency and RAM usage are bigger problem.
Furthermore, even with scaling solutions such as LN, you still need on-chain transaction to open and close channel.and current on-chain capacity isn't enough if Bitcoin is mass adopted (and even if all of them only use LN).

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Most of you are wrong, since SegWit activation, maximum block size weight limit is 4 million weight unit (not 4MB).

Actual maximum block size depends on the transaction (SegWit or non-SegWit) and how big (in byte) is the signature or/and P2SH size (if transaction use SegWit).
4MB block size is possible, but only under very specific transaction format.