Can't create a Data Gateway ADLS Gen2 connection on a container with a lot of data

I have an ADLS Gen2 Storage account with 2 containers:

- container-one: 1MB of data / 10 files

- container-two: 4GB of data 56 000 files

I can create a data sources on my Data Gateway on container-one (using master key)

But I can't create a data source on my Data Gateway for container-two.

Error: Unable to connect the datasource undefined -2147467259 Timeout Expired.