Automatically upload files over internet when USB is plugged in (Windows 7)

Hello, I need to be able to download files from USB devices with a simple script when it is plugged in. Assigned letter can vary (E: F: K: etc...) My employees are working from home on files like ppt, pdf, doc, etc... I would like to have the devices automatically synchronized to a server (HTTP request POST) when they arrive at the office and plug in their USB devices. There are 8 computers, all equipped with Windows 7 without admin privileges. The uploaded files must be only:. pdf. docx. ppt. xls. xlsx. .txt .doc .pptx I have no idea which language to use.