Just thought I would post up to let everyone know that this is definitely a SMB problem with the latest OSX version.
Problem: copying files to the Cloud device will end up with a long preparing to copy message and an error -36 message at the end. Smaller files may get copied but large files gets an error. No problems with reading a file/copying a file from the cloud to your mac.
The solution is to use afp or cifs instead.
Thus in selecting Go → Connect to Server or command k,
type in afp://xxx.xxx.xxx.xxx replace xxx.xxx.xxx.xxx with your ip number of your cloud
eg. afp://192.168.0.15
or
cifs://xxx.xxx.xxx.xxx
eg. cifs://192.168.0.15
SMB has always been a slight problem with the mac especially with very very large directories that contains thousands of files. Under SMB it can take up to a half hour to read 10,000 entries where-as afp will read a 10,000 directory in about a minute.
Although afp may be quick in reading the directory it is about 20-40% slower in copying a file.
For now, until Apple releases another update we are stuck with afp. Be sure to head to the Apple forums to complain about this.