Many people may think of the Mail Drop feature as iCloud-only, but Mac users can enable the convenient Mail Drop feature for other non-iCloud email accounts that are setup in Mail for Mac OS. This allows you to use the excellent Mail Drop feature for sending and receiving large files with just about any email account that you add to Mail app on the Mac.
For the unfamiliar; Mail Drop is a feature in Mail for Mac, iPhone, and iPad, that allows you to send and receive large files that would typically not be allowed over email due to strict file size limits of most email servers. Instead, when using Mail Drop on Mac, the large file is uploaded temporarily to iCloud, and the recipient of the email gets a temporary download link to access that large file. It works quite well, and you can initiate Mail Drop sending from a Mac or an iOS device, and virtually any recipient can download the file via the link whether they have an Apple device or not.
Mail Drop allows you to send files up to 5GB in size by using the feature, but remember it requires uploading the entire Mail Drop file to iCloud, which then presents itself as a temporarily available download link to the recipient so that they can download and access the Mail Drop file.