The Seagate Software works ok IF you tweak it. See below. had a great deal of frustration with this as well. First I tried messing with the file attributes, which created more problems than it solved. Just trust me on that one. Here's what I finally figured out: The default factory software settings from Seagate include a WHOLE LOT of UNNECESSARY files and file-types. Fortunately the software also includes the ability to uncheck folders and exclude specific file-types.
STEP ONE: I went to Seagate Manager and chose Backup>Edit Backup Settings
STEP TWO:I unchecked system-related folders in the documents and settings folder (folders such as LocalService and NetworkService for instance... any folder which was creating errors in my log, and which contained files which I did not generate).
STEP THREE: Click Next and Procede to the FIle-Types. Choose Custom. Choose Exclude These File-Types. Click on any File-Types which cause errors and you know you did not create (such as .db, .dat, .ini, .log, .sys) and click on the Add>>> button. This creates a list of excluded file-type.
STEP FOUR: Rename your Seagate Backup folder on your external drive. The software will create a new one and a brand-new clean log on your next backup.
After a fresh backup, your log will contain actual usable information, as opposed to buckets of spam which obfuscate and camoflage any important errors.
I hope this helps.