After travel my sims basic town missing

I write down, what exactly happened.

So my sim was in China, working on her karate skill, then holiday time was over, she had to travel home. 

I sent her home with phone, game was loading and instead of her home town and house, that screen appeared, where I have to choose a family/and a place to live, like a new game.

I got shocked, and by mistake I clicked on save, not save as, but fortunately with backup files I got my girl back with an earlier save, she was in China.

I sent her home again, but the starter screen appeared again.

I restarded the full game and my laptop but its still happening.

@szdorka  The first thing that comes to mind is a memory issue and virtual memory. TS3 is a 32 bit application and can't access more then 4Gb of memory and in reality the game uses about 2Gb of memory do to the compilers used. If your computer is a pc please post your computer's dxdiag - link - how to post your computer's dxdiag  thank you

Here is it.

I use only legal game.

You said you got the starter screen? But that doesn't necessarily mean the town is missing. Everyone could still be there in spite of the screen. I forget the process but you may either have to click on "edit town" or "switch active household" to get back into the game with all the sims you had before the active sim went on vacation.

If all the other sims are all there, it could be that for whatever reason, it's the sim who went to China who has gone missing. Because she is missing, the game is throwing up the starter screen when you return from vacation because it thinks you're starting a new game even though it's the same old town.

So, try that. Try going into Edit Town mode or clicking the "change active household" button to see what happens. Also, if you have any mods installed, remove them before you try returning home from China. 

So I tried what you've said.

Nothing happens.

I have my sim there (I play with one sim only), but fully from the start, like right efter I created her and need to move her in.

When I place her in, my game do just nothing. I can easy log out, save, go to menu, whatever, but nothing happens after I hit the play button.

Im not using mods. I tried before, a few times actually, but it never worked. I do not even know, whatdo they give, cos I could never use em :D

I installed only purchased sims3package files.

I'm sorry to ask so many questions, but what happens if you don't place her at all, if you just change to a different house altogether (don't place her)? Does the same thing happen? 

If so, I'm really stumped as to what happened. It sounds like the game glitched. Maybe someone else has some insight as to what to do. But if you really like this sim, maybe you could load the backup file again while in China, save this sim to your library, and start her over in a new game. (To save the sim, type in testingcheatsenabled true into cheat console, shift+click the sim, choose "Edit in Create a Sim" and save her to the bin). 

@szdorka  Is there a reason you have the system partition at 98.6Gb?  That is way too small. Is there a reason the drive is partitioned the way it is? 26.8 free space on the system drive is way too small. Why do you have a red WD drive that is  5400 rpm when you should have a 7200 rpm drive for a gaming computer. There are programs that can repartition a drive and enlarge the system partition. This is not without possible issues and most of the time the procedure works but.... I would recommend getting a new drive and image the existing drive to the new drive THEN try to repartition the new drive. If things go south you can always reinstall the original drive and your back where you started with not loss of data. You need to get some advise on how to properly setup your computer because as free space gets lower eventually you may have computer crashes and even operating system corruption where you'll have to regen the computer from scratch.

@szdorka The sims 3 is a 3D graphical game and the graphics depending on what expansion packs you have the graphics can get very demanding. This game is not linear in game play and the fact that there are expansion packs means this game will require more disk space for the user data on the system storage device as you add expansion packs. In many aspects this game is more demanding of your computer system then other 3D graphical games so the fact that you only play The Sims 3 means you picked a very demanding game on your computer hardware. The issue is your system device is not very big to begin with and you will have to constantly move data off the system device. There are advanced techniques can can help but as a casual user this will only delay the inevitable. hth