I don't recommend keeping her because she's trying to lay her eggs and you might cause her to bind up from the stress and it could kill her. But, if you do keep her you need an outdoor enclosure that's probably at least 8x8 with a barrier dug into the ground so she can't dig out, and a tall enough barrier that she can't climb over. she'll need a water dish big enough to wade into and multiple hides, she'll need leafy greens and protein and for protein you could give her worms or dead mice..

what does he need if i keep him? @tlw1596

That's not a water turtle! But way to go moving her from the road! it's their nesting season