It might be worth looking at WebDAV, although I’m not sure quite how much the plain MyCloud supports it. I use it on my MyCloud Mirror and it works fine when paired with a suitable app at the travelling device end.
This thread has some details on it which may be of interest, but I can’t vouch for how well it works on that device as it seems to need more spanner-work under the bonnet than my MCM did to get it running.
