Family pictures are the most common type of personal file stored by employees on corporate networks, followed by digital music, movies, and video clips and games, according to a survey by technology reseller CDW of its corporate customers.Although 62 percent of respondents say they don\u2019t think personal storage presents an immediate problem, 92 percent nevertheless want to ban, or at least limit, the practice.Why? Those baby pics are an information security threat. Or might become one. Every day it\u2019s getting easier to embed viruses and other malware into image files. Clearly, respondents felt it\u2019s best not to take chances.