There are a few size limitations for each type of attachment.
Extra Attachments:
Up to three extra files can be attached to each bug report (starting from the Team plan) in addition to the one automatically uploaded, which can be modified or deleted by the user.
The files can not exceed 5 MB each. Otherwise, they will not be sent by the SDK.
Logs:
Up to 100 user steps
Up to 500 console logs
Up to 1,000 Instabug logs
Up to 1,000 network logs
Up to 1,000 user events
When you exceed the max number of log statements, the SDK begins removing the older ones.