Is located in the folder corresponding to the path in the config.
To archive only at the level of the virtual FS - Sphinx with compressed formats doesn't work. You can try to cut the functional index (expand_keywords, index_exact_words, remove unused fields and attributes) - but it depends on how the index is used.
You can copy to another server without reindexing.
hassan_Bo answered on March 19th 20 at 09:03
Go to the folder index and see the size
Use compressed file system will weigh less