Pcloud and Data Encryption

[PhilJG2021]

I have successfully set up Pcloud in CloudSync to Sync several of my mapped drives on my TNAS. My Documents mapped drive on my TNAS is synced to Pcloud as encrypted

Looking ahead, if my TNAS server failed or was destroyed and I had to reinstate encrypted files from Pcloud, I cannot see a way of achieving this.
Please advise.

Using Windows Explorer to copy from Pcloud drive and paste to an empty folder on the TNAS server does not work. The file is copied but it is an encrypted version that is not recognised by the relevant app (eg Microsoft 365),

[TMzethar]

If your decryption key is correct, you can decrypt and synchronize data.