Gmail's maximum attachment size is 25 MB. How to send files bigger than that?
Google (now) offers Send Google Drive attachments in Gmail:
When you send messages in Gmail, you can attach files from Google Drive, such as documents and photos. This is especially helpful if the document is larger than the Gmail file size limit, or if you want to collaborate with others on the document.
Send a Google Drive attachment
- Open Gmail.
- Click Compose.
- Click Google Drive Google Drive.
- Select the files you want to attach.
- At the bottom of the page, decide how you want to send the file:
- Drive link: This works for any files stored in Drive, including files created using Google Docs, Sheets, Slides, or Forms.
- Attachment: This only works for files that weren't created using Google Docs, Sheets, Slides, or Forms.
- Click Insert.
Sharing settings for Google Drive files
When you attach a Google Drive file to a message, Gmail checks to see if your recipients have access to the file. If they don't, you'll be prompted to change the sharing settings of the file before you send your message.
Above for 'COMPUTER', there are versions for 'ANDROID' and for 'IPHONE & IPAD'.
Attempt to attach a file larger than 25MB and the following should appear:
so slightly more complicated than a smaller (true) attachment but surely a lot simpler than reliance on other apps (that also take the "via link" approach).