You can attach files—such as Microsoft® Office documents, Adobe® PDFs, and images and videos—to most kinds of Salesforce records. The size limit for an attached file is 25 MB when attached directly to the related list, including a file attached to a solution.The size limit for multiple files attached to the same email is 25 MB, with a maximum size of 5 MB per file.
Available in: Salesforce Classic
Available in: Contact Manager, Group, Professional, Enterprise, Performance, Unlimited, and Developer Editions
User Permissions Needed
To attach files to records:
“Edit” on the object
Open the record
Click Attach File.
Click Browse and find the file you want to attach
Click Attach File to upload the file.
Click Done when the upload is finished
When a file is attached to a record’s Chatter feed it’s added to the Notes and Attachments related list as a feed attachment. The file size limit for Chatter feed attachments is 2 GB.
If the Don't allow HTML uploads as attachments or document records security setting is enabled for your organization, you cannot upload files with the following file extensions: .htm, .html, .htt, .htx, .mhtm, .mhtml, .shtm, .shtml, .acgi, .svg.