I have 3 external drive in NTFS that I would like to plug in. Will it be possible ?
Syncloud itself allows only a single external disk with ext4 filesystem on it.
Do you want them to be visible independent or not?
Does it have to stay ntfs and why?
You could create a disk array into a logical disk and then use it in Syncloud, here is some info: Multiple Disks · syncloud/platform Wiki · GitHub
As I know there are direct attach storage enclosures but I have not used them myself.