UX could be clearer in warning people that they will use mobile data

[RollingStar]

Description of the issue

First off, I'm not blaming the app developers. If I stuck with more of the defaults, this wouldn't have happened. But I did use about 2.2 GB of my 2.5 GB mobile phone data quota (maybe more) in a single night of taking videos that are synced to my home PC. I didn't intend for syncthing to operate at all on data.

I'm suggesting maybe a different UX to steer people toward safer usage.

User story 1: "I want to start Syncthing right now, on wifi"

Because I was always at home when I did this, I never noticed that Syncthing would run on data while "force start" was active. I also don't have a strong opinion on forcing it to stay running constantly - if the 'force start' timed out after 5-30 minutes, that would be fine with me.

User story 2: "I want to be notified when something is different"

I got alert fatigue quickly with the constant, un-dismissable notification that Syncthing was sleeping. I disabled notifications completely which meant I didn't see that I was transferring data on mobile. The 3 notification categories are:

1. Syncthing active
2. Other Notifications
3. Monitoring run conditions

For me at least, I would want:

1. Active transfers
2. Syncthing WILL transfer (but there's nothing new to transfer)

Mobile data transfers are a lot costlier to most users, so I think it makes sense in the UI and notifications to emphasize when mobile data transfers may happen. As a user, I don't consider "run every hour" and "run on LTE" to be equal.

Thanks for reading.