How should I allocate my 401k?

I have an employer 401k at Fidelity.

My current allocations are:

32% in Fidelity Contrafund

55% in NT S&P 500 Idx NL 4

5% in MFS Mid CP Growth CT

2.5% in NT Ext Mkt Idx NL 4

4.4% in TRP Retire 2035

I'm almost 50 and realistically will probably retire at 70. The majority of my money is in S&P Idx and the Fid Contrafund. Should I move the other money, which might be $20k in those other options(I basically stopped contributing to those, so that's what's just sitting there) to the S&P 500 Indx? Will that incur hefty fees that would not make it worth it?

I have 26 options. 13 of those are target year funds which I've learned here are not good.

3 of them are bond investment funds, which I'm assuming are for when I'm much closer to retirement age.

So that leaves me with 10 funds. Should I just put it all in the S&P index fund? I don't have VOO.

It's 3 large caps, 3 mid, 2 low and 2 Intl.

Please, any guidance is really appreciated