what did the reboot bring ?
before i go in this way. why do you think that the dir /4 is the right place?
They are all my files. I fear that put the Update directory can do them something wrong Perhaps it is better to create it in /md4/shares/1.
What do you think?
Look to the dates of the folder 1...4 seems it creates every time you recover date or update that it it creates a new one, and probably the firmware will use the last folder. In other lacie's users described to unpack a capsule you need to create a folder with name "Update" (note the capital U at start of the name) and put there a capsules. The lacie firmware will then install this capsule when it finds the Update directory and a capsule file inside. If it will affect your files...normally not but I am not 100% sure.
Your data is it really 14TB or is that the total size of the disks together. If you want to avoid taking risk to loose the data then there are a few ways.
Copy them to the free space in the raid array (if there is enough free space) using another folder name, transferring them to an external usb disk or via network to another PC