Exploring options to allow user to include attachments from their mobile device for computer. These files would be either CAD or PDF files. I don't want to use the image type because it also allows the user to take a picture.
The field app currently only supports attaching image files to a survey, it does not support other file types. With iOS and Android app you can only attach image files from gallery. That being said, if you are using the field app on Windows, it is possible to change the file type chooser to All Files and then select a different file type. Provided the file type selected it supported by AGO or your Portal version, the file will upload as an attachment successfully.
Solution: I ended up zipping the files and it seemed to work. Another option is using the file uploader type in the web builder
If it is possible to attach other things why are you blocking them on Android and IOS then?
The uploading of other attachment types (such as word, pdf and zip files) is not currently officially supported in the field app as we need to be able to support it on all OS versions we support. Whilst it does work on some platforms and devices by changing the file chooser to "all files", this doesn't work on others. Previously on iOS this has not been possible to upload other file types besides images, due to the way iOS doesn't allow access to a file browser. With recent updates in iOS 12 this is now possible in a limited way, and we are working towards supporting other file types. Once this is implemented across all platforms it will be available for all OS versions we support.
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