OK, in that case you could
- download the files for example via scp and put it to another USB disk. It would also be possible to put the files to a samba or NFS share of a NAS.
- backup to some cloud provider like S3 or B2 and restore from that
- use rsync to copy the files, see Migrate NS7.9 to another NS7.9? - #2 by Andy_Wismer