Thanks! Every bit helps. :)
Regarding server specs:
RAM: 64 GB DDR4
Hard Drive: 2 x 2 TB SATA 6 Gb/s 7200 rpm HDD Class Enterprise
(Software RAID 1)
Connection: 1 GBit/s-Port
Guaranteed bandwidth: 1 GBit/s
Backup space: 100 GB
Traffic: 30 TB *