DrLove: I just finished downloading my entire GOG library and want to back it up to an external hard drive, which I'd keep off-site. Before I do so, however, I'm concerned there may have been some errors in downloads. The total count is 3430 files and 916GB, so some of the files may have gotten corrupted in the download process. I'm wondering whether anyone could help me out with two questions regarding file integrity:

1. Verifying the downloads: Is there an easy way to check for file integrity, preferably a batch program? I already know to check for digital signatures of single .exe files, but for multipart downloads, I know of only enabling the file integrity check during installation. I don't want to spend the next two weeks installing and uninstalling games, though.

2. Any suggestions for a good backup software? Preferably one that checks that the file has been successfully copied over to the external drive. Backup scheduling is not necessary - I'll keep the drive off site and will bring it to manually back up my files only occasionally.

DrLove: 1. Verifying the downloads

Melvinica: This might be what you're looking for https://www.gog.com/forum/general/gogrepopy_python_script_for_regularly_backing_up_your_purchased_gog_collection_for_full_offline_e

drmike: How did you download them? I know with the old GoG downloader you can requeue the downloader links and it will check what you downloaded to make sure it's correct:

https://www.gog.com/downloader

nightcraw1er.488: I don't think there is a way to validate them now you have downloaded them, unless you somehow extract the md5 checksums from gog, maybe look at gogrepo.

For the second, I would really suggest freefilesync. It can sync files across drives and is very easy to use. I have used it for quite a while now for all my backups.

I would also have a second back up, in fact have as many as you can afford. Hdd's do fail, and when they do they it's not always possible to recover. It's really bad when you lose, not just the files which you may be able to get again, but personal ones, and the effort you put in to organise.

Another tip, setup a structure that your happy with. It is so much easier to programmatically move or restructure this data later on if it is consistently stored first off - trust me, after a few reorganisations it really will save you days later on. Try to get it right first time, include saves, mods, patches etc. Anything you may want to keep.

Also, one other thing, get teracopy - it plugs into windows explorer and does copy/paste. It's far better than windows copy/paste, and it has an option which can check what was copied matches source, which is invaluable to get perfect copies.

DrLove: Never got the Downloader to accept my login info, so I gave up on it. I was under the impression that it was actually end of lifed after Galaxy was released. Many thanks!

DrLove: I just finished downloading my entire GOG library and want to back it up to an external hard drive, which I'd keep off-site. Before I do so, however, I'm concerned there may have been some errors in downloads. The total count is 3430 files and 916GB, so some of the files may have gotten corrupted in the download process. I'm wondering whether anyone could help me out with two questions regarding file integrity:

1. Verifying the downloads: Is there an easy way to check for file integrity, preferably a batch program? I already know to check for digital signatures of single .exe files, but for multipart downloads, I know of only enabling the file integrity check during installation. I don't want to spend the next two weeks installing and uninstalling games, though.

2. Any suggestions for a good backup software? Preferably one that checks that the file has been successfully copied over to the external drive. Backup scheduling is not necessary - I'll keep the drive off site and will bring it to manually back up my files only occasionally.