can not play music from track collection

Hello,

I replaced the SSD drive in my laptop with a larger capacity one. Previously, I always used an external portable drive to store music - I saw it as drive D:. Now I transferred the music from the external portable drive to the SSD drive of my computer C:. In the program Traktor pro 4, I entered the music from the C: drive into the track collection. When I search for a song, the program tells me that it cannot play it. When I look at the location of the song in the track collection, it is still D:

Does anyone have a solution

Thank you

dj.Tomy