File with DB extension contains a database, usually structured, comprised of data records organized in tables along with relationships between those tables. The structure of database stored in DB file is defined in the same file. DB is a generic extension used by various database applications.
After converting the file to the new format, you will be able to use other programs to support it. Keep in mind, however, that the MYD file after converting to DB may differ slightly from the original. The most important information should be kept, but if you want the file after conversion from MYD to DB to be the same, you have to do this carefully and choose the proper application from the list below.
There is no guarantee, of course, that the conversion will come up to all your expectations, but it will certainly help you. If, after all, the effect of converting MYD to DB does not meet your expectations, you can simply try to find on the Internet a different version of your file in MYD format, properly converted to a DB file by someone else. If this fails, use the information provided in the further part of the website.
Unfortunately, if after performing the two previously described steps (trying to find your MYD file converted by someone else, and the attempt to convert it to DB on your own) you still have a problem with your file, then there are only a few solutions left. You can once again try to find and install an application that can open the MYD file in its original format (without conversion to DB file). Such a solution will be difficult to implement, but it certainly will give the best result.