I don’t know about the space. This says 1G and maybe up to 4.5G. Are you on Windows?
https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-system-requirements/minimum-syst...
Don't know what you are asking about SS and Medicare? Do you have self employment income?
You will pay Self Employment tax (Scheduled SE) on a Net Profit of $400 or more on Schedule C in addition to regular income tax on it. You pay 15.3% SE tax on 92.35% of your Net Profit (If it is greater than $400). The 15.3% self employed SE Tax is to pay both the employer part and employee part of Social Security and Medicare. So you get social security credit for it when you retire.
