Follow the below-mentioned guide to attach files in Canary Mail on Android Devices:
1. While writing or replying to an email, tap on the attachment icon on the top right corner.
2. To attach images in Android devices, tap on Add Photo > Select the photo you want to share.Note: Note that images will be attached inline and not as attachments.
3. To attach file/s or PDF’s, tap on Add File > Select the file you want to attach on your Android device. To choose files from a different location, tap the menu icon at the top left and select where to upload the files from (e.g. Gallery or Google Drive).
Note: Canary uses an attachment size limit reported by the server. If your files are larger, we recommend you upload them to cloud storage and paste the link in your email.