Water Leakage
If you look past the bag on the floor, you can see where the water would gather in a puddle. This would happen mostly after heavy rains.
Basement Waterproofing Job
In the last image you got to see where water would puddle in the basement, this was due to the fact that this basement didn't have any form of water protection.
What's Left Behing
That huge circle on the basement floor is what is left behind after heavy rains. The homeowner also said that this wasn't the only area that puddled. After further inspection, two other spots on the floor also did the same!
More Standing Water
If you look at where the finger is pointing, there is another puddle of water. Thankfully this area is now waterproofed and will stay that way for years to come!