hello why is my out connection

hello why is my out connection eating so many data? sorry for the noob question. Here’s for example:

2018-02-26My ComputerSG Asia (Singapore - Vultr)0.0/0.0 MB96.2/638.8 MB

Frankly speaking I don’t know. Did you try to check other entries at Access Log? The above entry you show is a sum of other entries.