Are you actively seeking to open 0.skb? If so, the .skb file extension is the sketchup backup file, not the working file, which is .skp
I believe you already know this, so--pardon my repetition above.
I have had similar problems but primarily with a usb storage device which either was running out of capacity or which had some other undefinable problem.
But you are talking about file use between two computers.
My GUESS is that the file should reside completely on the machine you are using, and you should save your work on the machine you are using. Then, if you wish to update the file in the original machine, you should then save a copy of the file to the original machine.
Again, this is just a GUESS.
Could someone else confirm?