Èíòåðíåò-ìàãàçèí äåðåâîîáðàáàòûâàþùåãî îáîðóäîâàíèÿ
dd stands for "Data Duplicator." It is unforgiving. If you choose the wrong disk, you destroy your data.
The process will:
A: No. The process erases the drive and creates a hidden partition structure. Adding files will likely break bootability.