Hi, I have 2 questions, I would be happy if someone can help me in this.

does someone know how can I correct this error? (pic related).
'VENTAS_DATA' is an .mdf of the database

the second questions is that, according to my teacher ,snapshots should have been created in D:\, where I was working the database, but at the end he created in c:\ doing other changes that he didn't explain that well, he was trying and trying until it was created, but i ended confused about the real way to make it.

why this happened?, is it because you use the master , that is in the c:\,and you use it to create the snapshot?