Open up a high yield savings account. There are plenty of places to choose from with rates over 4%, and as high as 4.85%.
https://www.bankrate.com/banking/sav...ings-accounts/
Assuming you put in $100,000, and earn 4.85% compounded daily, you should get $4969.20 in interest after 1 year according to this compound interest calculator.
https://www.bankrate.com/banking/sav...gs-calculator/
If you want to go with CD's, you can get well over 5%.
https://www.bankrate.com/banking/cds/cd-rates/
I opened a high yield savings account a few months ago with UFB Direct, and was able to get an interest rate of 5.02% APY. I was tired of getting 0.5% at my local bank, and before that it was at 0.1% for the longest time.