Just stick with ACT or prep for SAT again too?

My junior sister just got her results for Jan
SAT (1260- 680 R+W and 580 math) and Feb. ACT (Composite 30, E- 32, M- 26, R-32, S-30, STEM 28) , both first time with minimal prep. Looking for knowledgeable opinions if she should just focus on ACT and stop taking SAT or continue with prep for both again. Thanks.

https://collegereadiness.collegeboard.org/pdf/higher-ed-brief-sat-concordance.pdf
ACT