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This question already has an answer here:

I have a failure to transfer my game from one HDD to another, and one PC to another. I copied the entire Skyrim folder from one HDD to another. And told where to find it also. Steam did a huge check of my HDD.

But it ended up downloading most of the files anyway. It took a week to download Dawnguard, Hearthfire, and Dragonborn files along with my Hi-Res textures.

I did ask about it in chat. But I feel this could help me or somebody else.

This is the screen I am looking at after transferring my entire hard drive to to new one. Steam downloaded my games, including Skyrim even though my Skyrim data folder had all the data files for Dawnguard, Hearthfire, Hi-Res and Dragonborn.

I have my copied files and have got rid of everything not steam related. I just have my DLCs and they include my hires files.

This is what it looks like.

enter image description here

But I still get this :

enter image description here

What could be causing this? How can I rectify? And in future when one is migrating to a new PC, how can this be avoided?

EDIT::::::::::::::::: Removed everything : Here is how it looks :

Still the prompt as before Steam Error 15

(Side Note : I transferred all my Origin games just by copy/pasting. This really is not nice.)

enter image description here

EDIT 2 :::::::::::::::::::::

And one more EDIT

I tried getting game cache up to speed, but this is prompt I am getting. But I played the game, it was working, I could pick out my character and all, and escape from Helgen.

EDITED 3 :::::::::::::::::

How does one transfer a Steam game? A game that is heavily modded, will the backup a Steam Game option suffice?

enter image description here

marked as duplicate by aytimothy, Mathias711, Jeeva, user106385, MrLemon Oct 19 '15 at 11:21

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • Did you install it using the "Nexus Mod Manager", through the workshop or manually? – aytimothy Oct 13 '14 at 2:27
  • So all your mods are from the Steam workshop? – aytimothy Oct 13 '14 at 8:53
  • Just to add, this method can be used on any game/software. – aytimothy Oct 17 '14 at 0:51
  • (This is probably going to get a moderator's attention but) you're welcome. I'm glad it helps. I use it all the time. – aytimothy Oct 18 '14 at 0:28
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+50

You can look at How do I move Steam games to a new computer without re-downloading them? but the information there may be out of date.

Along as: https://support.steampowered.com/kb_article.php?ref=7418-YUBN-8129
(Quoted from Dav's answer)


There are 2 ways you can go about moving your files.

1. Copy your entire folder.

  1. Go to your .../Steam/SteamApps/common/... folder.
  2. Copy the game files and the metadata that Steam creates.
    That's your Skyrim folder and appmanifest_72850.acf, one folder up.
  3. Move those folders/files to another Steam Library folder (or create one if needed).
    You can do this in the settings; Settings > Downloads > Manage Steam Library Folders...
  4. Now, restart Steam for the changes to apply.

Note: The reason it may not have worked for you is because you forgot to copy the app manifest, which is found in: .../Steam/SteamApps/appmanifest_72850.acf.

or: 2. Backup your game and restore it in the new location*.

Note: This step does not preserve your workshop files. Only the main game files (including DLCs'). Steam will automatically redownload the workshop mods.

  1. Right click Skyrim in the sidebar. Then select "Backup Game Files".
  2. Select a folder to save the files to and follow the prompts... And wait for it to finish. Once it's done:
  3. In your Steam library, right click Skyrim and click "Delete Local Content".
  4. Now, click on the Steam menu (should be on the top left-hand side of the Steam interface) and select "Restore and Backup Games".
  5. Pick 'Restore' and select the folder where you saved the backup to (in Step 2).
  6. This time, when prompted to select where to save your game to... Select your other Steam Library folder, rather than the primary (already selected) default one. Select another place.
  7. After this, Steam should start automatically redownload your workshop mods.
  8. Don't restart Steam. (You don't need to)

Side note: This method can be done for any game. You just need to find the AppID for the game you want to move...

For example, if I wanted to move Audiosurf, I would move the Audiosurf folder and appmanifest_12900.acf.

You can find the AppIDs in the game folder as a gameid.txt or, by getting the number off the store page. (Or search the game's ID number from the list on the Valve Developer Wiki; here, or SteamDB)

  • If you've already started a new download... The manifest file will indicate to Steam "This game is half-way being downloaded and * this * is the progress.", so it may not be wise to copy it. The only solution from there is to continue downloading. – aytimothy Oct 13 '14 at 10:28
  • I'm glad it helps. Have fun :) Don't forget to mark the answer as an answer (clicking the tick). – aytimothy Oct 13 '14 at 13:00
  • @aytimothy Doesn't that only work if you are on the same OS type? I moved from a 32bit to a 64bit environment and had to re-install virtually everything. – franglais Oct 13 '14 at 15:25
  • @ヴァイシャリ I'm not saying that it's not a very good answer (because it is) but just want to raise the issue in case anyone else comes here and finds it doesn't work! – franglais Oct 15 '14 at 13:30

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