Gotcha!s with a DS220j?

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I am impressed with your IT skill at respectful age.DS220j just like all J series are very simple models made for first time users or simple backups. They are limited to EXT4 because they could not run snapshots that require BTRFS.But there is no restriction on multiple volumes though.Here is what they say:"Create multiple volumes in a storage poolMultiple volumes can be created in a storage pool if it supports multiple volumes. If your RAID type is RAID 0/1/5/6/10, you can create multiple volumes to avoid the 16 TB or 108 TB limitations; however, the maximum size of each volume still needs to be smaller than 16 TB or 108 TB, respectively.To check whether a storage pool supports multiple volumes and to create multiple volumes, please do the following:On your DSM, go to Storage Manager > Storage Pool and expand the information of a storage pool to check if it supports multiple volumes.Note: If the Multiple volume support field shows Yes, it means that the storage pool supports creating multiple volumes.If the storage pool supports multiple volume creation, go to the Volume page and click Create to create multiple volumes in the same storage pool."https://www.synology.com/en-global/knowledgebase/DSM/tutorial/Storage/Why_does_my_Synology_NAS_have_a_single_volume_size_limitationI remember when the volume was created without a storage pool, then there were few limitations. May this is it: Storage Manager > Storage PoolI hope this helps.