The technician should add the update site to the client's exceptions list to bypass the proxy. This can be done through the client's web browser settings, where the proxy settings can be configured. By adding the update site to the exceptions list, the client will be able to access the site and download the software update.

The technician should quarantine the system first1
Reference:
CompTIA A+ Certification Exam: Core 2 Objectives Version 4.0. Retrieved from https://partners.comptia.org/docs/default-source/resources/comptia-a-220-1102-exam-objectives-(3-0)

Since Windows systems support FAT32 and NTFS "out of the box" and Linux supports a whole range of them including FAT32 and NTFS, it is highly recommended to format the partition or disk you want to share in either FAT32 or NTFS, but since FAT32 has a file size limit of 4.2 GB, if you happen to work with huge files, then it is better you use NTFS