I don't know if this is the same problem or not, let me explain. I am into 1940, got moved to Brest. My latest mission is way up to the north west of Scotland; I get up there and do my allotted 24hrs, not much action.
I then get a radio message there is a large convoy close by, to the south. I head off and make contact with it. I am making loads of saves, usually on the surface, usually just after anything important happens, or I sink some old barge, so there are like 10 saves all with different names for this one mission, never mind this career.
I do this because I am new to the game, and if I screw up I want to try again and see if I can do it better. I am so absorbed in this process, I haven't installed any mods yet, so I have a ton of goodies to look forward to!
Anyway, the first time I get in amongst the convoy, I get 4 fish off, sink one or two, miss one, damage another, but the escorts pick me up and blow me away.
I go back to a good save point, and try again, and it is better, I get the 4 fish off, but get out of dodge, reload, and find the convoy again, so I save at this point. There are still 10 or 12 saves for this one mission under my career.
This morning when I come back to it, there is absolutely nothing in the saved career folder, totally blank. I look in my documents, and there are no files with the names I gave them. Is this the same problem, or something else?
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Foot down, head down...