Two points that are most likely to be wrong in mass production U disk

Many friends like to mass-produce U disk into CD-ROM format when starting with U disk, but there will always be such problems in the process of mass production. Now let's talk about the two most common mistakes. First, the U disk chip model is wrong. Second, the computer USB socket current and voltage are insufficient. The first reason everyone understands, the second reason we don't understand, let's take a closer look. At the beginning, during the test on 14 computers, we found a strange phenomenon, the same U disk and production software (production tool software), some computers can be successful, some can not be successful, and even change After using its chip-specific mass production software, even the correct U disk capacity can not be recognized (for example, 4GB is recognized as 2GB, or 4GB is recognized as 8GB), so we should pay more attention to this.