For me the value in a dedup app like this isn't as much the space savings, since I just don't generate huge amounts, but it's the lack of duplicated files, some

For me the value in a dedup app like this isn't as much the space savings, since I just don't generate huge amounts, but it's the lack of duplicated files, some of which or all in aggregate may be large. There are some weird scenarios where this occurs, usually due to having to reconcile a hard drive recovery with another location for the files, or a messy download directory with an organized destination. For example, I discovered my time machine backup kicked out the oldest versions of files I didn't know it had a record of and thought I'd long since lost, but it destroyed the names of the directories and obfuscated the contents somewhat. Thousands of numerically named directories, some of which have files I may want to hang onto, but don't know whether I already have them or not, or where they are since it's completely unstructured. Likewise, many of them may just have one of the same build system text file I can obvs toss away.