Import a large database od Dicom files

Hello everybody,

I have a large database of DICOM files (about 56GB) stored on an external HDD. I installed Orthanc on a raspberry pi and the explorer is working fine.
How can i import all my database after attaching my hard drive to the RPi? Should i upload all the folders one by one?

Thanks and sorry for the noob question. Couldn’t find an answer in the documentation.

This could help:
https://bitbucket.org/sjodogne/orthanc/issues/12/upload-dicom-to-webinterface-only-accept