[mothered]

at least... it allowed me to use same account data

I've never used Megabox, but do remember It due to Its correlation with Megaupload.

Fingers crossed Mega.nz doesn't go down. Although I have local backups, I have a lot of files hosted on their servers.

i think that mega will be a long time. the reason (for me) is that MEGA deletes the file with a report and the other reason why I think this is that MEGA promises to have encrypted all its contents, that was something that made it clear from the beginning, to avoid takedowns.
Either way, one can never know if they will do something. For that reason, I already downloaded the most important thing I had there. 

Agree.

Mega has certainly learned their lesson since the last takedown, and have Implemented measures (when It was officially launched) to make sure It's not repeated.