I use PC version opera developer and save all bookmarks in my account, but unfortunately I cannot use it on my android mobile.
I have several android phones, but I tried on each and couldn't log on my opera account by any of them.
The message shown is always "Temporary server error. Please try again later"
Since synchronization cannot work, I have to copy and paste all my bookmark links to other browser and save them. (yes, also find there is just an import function, no export bookmark function.
Hope someone can help me. Thanks a lot!