Why are these marking showing up on all of my photos?

There is more than one reason that this issue is occurring. One reason can be simply the mirror is dirty. Another reason can be the mirror is scratched or damaged. You can also check the card reader if it is functioning correctly .

The mirror being dirty CAN NOT affect the picture as the mirror flips up out of the way when a photo is taken. The mirror is only used to reflect the light into the viewfinder for composition. If you are getting vertical lines it could be a faulty card or card reader, the blurry spots are most likely dirt on the sensor take it to a reputable dealer for cleaning.