How long does it take to sync Gmail to phone after storage data delete?

[Android Central Question]

Accidentally deleted STORAGE data not cached data on my Gmail app, now it's saying it's trying to get my messages, and waiting to sync. What does this mean and how long should it take??

 

[Rukbat]

If the server is busy or your connection to the server (that depends on internet traffic) is really slow, hours. If your connection is fast, a few minutes.