: You need a program like WinRAR , 7-Zip , or The Unarchiver (for Mac) to open these files. Change the Default Program :
: Right-click the file, select Open with... , and choose your extraction tool (like WinRAR or 7-Zip). Check the box that says "Always use this app to open .rar files". Download dr1a rar
: Sometimes files are downloaded with a double extension like dr1a.rar.txt . If this happened, rename the file to remove the .txt part so it ends only in .rar . : You need a program like WinRAR ,