Cowtransfer, an online large file transfer service that focuses on e-mailing, features free of charge and downloads resources at full speed, is your helper in file-sharing. Cow express supports anonymous sharing, registered user sharing, and fee-paying user sharing, sharing anonymously without the need to register a document of up to 4g size that can be uploaded, generating a shared link with password access and keeping the document for 72 hours. The registered user shares without limiting the size of the file and can be saved for seven days. Of course, if you need it, you may also choose a pay user for the fast flow of cows, an unlimited storage space, long-term storage without deletion, and support personal transmission domain names, personal transmission background, and custom download link time limits and custom downloads. For ordinary users, anonymous sharing is sufficient, and detailed use of the curriculum is described below. The current traditional document transfer, cloud storage tools with, to a greater or lesser extent, such other limitations as uploading or download speed limits, and forced landings have resulted in high time costs and poor use experience, which significantly reduces efficiency. The cow was born out of the pain of "spreading documents" as a normal routine. Since the document transmission service came online in 2016, a large number of students from around the world, users of advertising ideas, design industries and internet-related companies have been included. The operational interface for the fast-moving cows is very simple, with only one large button left in the interface centre, and after adding the file, the file is quickly uploaded and then the downloading link, the 2-d code and the applet code of the document is removed. Only two to three interactions are required throughout the upload process. Cow express is a file transfer tool based on browsers, software that provides users with fast, clean file transfers without registration, which can be delivered directly and quickly! Cow express is a good web upload software with multiple upload modes that help users quickly upload important files to the cloud to avoid data loss, speedless upload downloads and good use。