Mention of "Sony" would imply your question is about one of the Magix (not Sony) Vegas product range. Is this correct?
If so, please read this pinned post and follow the advice given there. You should repost your question in this present forum ONLY if you have Magix Movie Studio version 18 or later.
Mention of an sd card is a little confusing; you cannot install programs to an sd card so I am unsure of what you mean.