In an Archivista archive, an archiving process takes place at regular intervals. This archiving process 'bunches' and compresses the added pages. An important point here is the preparation of the files and pages for retrieval. That means before you can burn a CDR, DVD or M-Disk with the data, the system prepares the corresponding ISO files. Under Size of the swap folder (MByte) you can specify the maximum size of the swap folder.
When using M-Disk media a value of 90000 to 92000 is reasonable. This corresponds to 90 or 92 GByte.