i have some questions
1 - Tell me the DB name which i need to move from one folder to another folder ?
2 - What will be the effect occur in dynamics ax 's DB log files to another folder ?
Well, it doesn't really have much to do with AX; AX knows nothing such implementation details of SQL Server.
Regarding "Tell me the DB name which i need to move", it's completely up to you. We don't know what you need. If you want to modify a database for a certain AOS but you don't know which database it is, look into configuration of AOS or open System administration > Inquires > Database > Database information inside AX GUI.
We can't tell you much about the effect, because we don't know anything about your storage. If you move it to a more appropriate storage than where it is now, you may get better performance, reliability or whatever you're trying to achieve. But if you move at a worse place, you'll make things worse. If you now have a dedicated disk for each log and you put them o a single disk, you can expect significant performance degradation, because the head will be jumping between different files. But it may be completely acceptable some development boxes or so.