Store large CodeSystem

Question

I'm migrating from HAPI FHIR Server (6.1.0) to AHDS using FHIR Service, but I have some large CodeSystem files to import, almost 2 MB, when I try to import using API: PUT {{ _.baseUrl }}/CodeSystem/?url={url} receive the message error:

 Operation timed out after 30010 milliseconds with 0 bytes received
 Closing connection 12
 TLSv1.2 (OUT), TLS header, Supplemental data (23):
 TLSv1.3 (OUT), TLS alert, close notify (256):

I'm not sure if I should use $import to CodeSystem or there is another option to store large CodeSystem. I would like to hear the opinon of community.