You can upload a whole folder instead of individual files. Click the downward chevron beside the “Upload” button to bring down a submenu, and click the “Upload Folder” option. Your computer’s folder directory will come up.
A B1 file is an open archive file format, much like a zip file. The B1 file will be created in the background and it will be placed in your main 4shared folder. If you’re downloading just one file, it will not be compressed into a B1 file. It will be downloaded as is.
If it’s a B1 file, you have to extract it first to get the files inside.
