Rclone recopies subset of files each time, despite no changes

What is the problem you are having with rclone?

On Windows I am using a simple alias remote "alias0" which points to local C:/Folder2. The source folder I am normally backing up to this location is C:/Folder1 which has about 30,000 files in it. Whenever I run the simple command:

rclone copy C:/Folder1 alias0:

...it runs correctly, except that a subset of exactly 214 files is recopied every single time, even though they are already present in the alias remote location. The other several thousand files are just "checked" but the same 214 are "transferred" each time regardless. Even though timestamps and file sizes are already identical, and I run the copy command again immediately after the previous one finishes.

The 214 files in question aren't log files or anything like that which the system might be updating constantly. They are all static test files like PDFs or JPEGs etc which never change. So I can't quite figure out why rclone is designating these files as needing to be re-transferred.

Run the command 'rclone version' and share the full output of the command.

Since this is occurring on an old windows machine with no internet connection, I can't copy and paste directly. But it is rclone 1.62.2 on Windows 7 Ultimate Edition.

Which cloud storage system are you using? (eg Google Drive)

Local alias remote

The command you were trying to run (eg rclone copy /tmp remote:tmp)

rclone copy C:/Folder1 alias0:

I've noticed this happening with other larger folders as well with more files. Even though the copy/sync command is rerun right away, a certain subset is always flagged for re-transfer, and it is always the exact same number of files and total gigabytes to be re-transferred each time.

i suggest to pick a single file on the source and dest, let's call it file.ext
can try these tests and post the full output. note: change the source and dest, to match your system.

  1. copy the file.
    rclone copy C:/Folder1/file.ext alias0: -vv -- dry-run
  2. check the file
    rclone check C:/Folder1/file.ext alias0: -vv