What is the problem you are having with rclone?
Size command may return incorrect value for folders with chunked files. It miss some fully & correctly uploaded chunked files as if they do not exist or they are missing some chunks (normally file is not shown if not all chunks are present). The same behaviour happens for sync/copy commands with --fast-list flag. Without --fast-list flag, all files are correctly enumerated and there are no unnecessary same files re-uploading. It happens to two different remotes too (Google Drive + Jottacloud). And the missing files count is different for different remotes (what is very strange). For the case in a log example: 19 files out of 20 for Google Drive and 10 files out of 20 for Jottacloud (totally no chunked files at all are enumerated). I believe that this difference may be caused by differences in timing between those two remotes. Due to this bug, not all chunked files will be copied/synced when used with --fast-list flag and copied from the chunked source (very important).
What is your rclone version (output from rclone version)
rclone v1.52.2
- os/arch: windows/amd64
- go version: go1.14.4
Which OS you are using and how many bits (eg Windows 7, 64 bit)
Windows 10, 64 bit
Which cloud storage system are you using? (eg Google Drive)
Google Drive; Jottacloud
The command you were trying to run (eg rclone copy /tmp remote:tmp)
rclone size gcrypt-chunk:"chunked_folder/" -P
rclone size jottacrypt-chunk:"chunked_folder/" -P
rclone copy "C:\chunked_folder\" gcrypt-chunk:"chunked_folder/" -P --fast-list
rclone sync "C:\chunked_folder\" gcrypt-chunk:"chunked_folder/" -P --fast-list
The rclone config contents with secrets removed.
[gdrive]
type = drive
scope = drive
token = [REDACTED]
root_folder_id = root
[gcrypt]
type = crypt
remote = gdrive:
filename_encryption = standard
directory_name_encryption = true
password = [REDACTED]
password2 = [REDACTED]
[gcrypt-chunk]
type = chunker
remote = gcrypt:
chunk_size = 1G
name_format = *.rcc##
hash_type = none
A log from the command with the -vv flag
Quite heavily redacted for privacy 
. I hope I didn't distort it too much. Really didn't like to do that. Wasted some time for that thing in the hopes that it would really help fix this bug.
rclone size gcrypt-chunk:"[REDACTED]" -P -vv
2020/XX/XX XX:XX:XX DEBUG : rclone: Version "v1.52.2" starting with parameters ["rclone" "size" "gcrypt-chunk:chunked_folder/[REDACTED]" "-P" "-vv"]
2020/XX/XX XX:XX:XX DEBUG : Using config file from "[REDACTED]\\rclone.conf"
2020/XX/XX XX:XX:XX DEBUG : Chunked 'gcrypt-chunk:chunked_folder/[REDACTED]"
2020/XX/XX XX:XX:XX DEBUG : Chunked 'gcrypt-chunk:chunked_folder/[REDACTED].rcc02" without meta object
2020/XX/XX XX:XX:XX DEBUG : Chunked 'gcrypt-chunk:chunked_folder/[REDACTED].rcc03" without meta object
2020/XX/XX XX:XX:XX DEBUG : Chunked 'gcrypt-chunk:chunked_folder/[REDACTED].rcc06" without meta object
Transferred: 0 / 0 Bytes, -, 0 Bytes/s, ETA -
Elapsed time: 0.0sTotal objects: 19
Transferred: 0 / 0 Bytes, -, 0 Bytes/s, ETA -
Elapsed time: 0.0s
2020/XX/XX XX:XX:XX DEBUG : 6 go routines active
rclone sync "C:\[REDACTED]" gcrypt-chunk:"[REDACTED]" -P --fast-list --dry-run -vv
2020/XX/XX XX:XX:XX DEBUG : rclone: Version "v1.52.2" starting with parameters ["rclone" "sync" "C:\[REDACTED]" "gcrypt-chunk:[REDACTED]" "-P" "--fast-list" "--dry-run" "-vv"]
2020/XX/XX XX:XX:XX DEBUG : Using config file from "[REDACTED]\\rclone.conf"
2020/XX/XX XX:XX:XX DEBUG : fs cache: renaming cache item "C:\[REDACTED]" to be canonical "//?/C:\[REDACTED]"
2020/XX/XX XX:XX:XX DEBUG : Chunked 'gcrypt-chunk:[REDACTED]': invalid chunks in object "[REDACTED]"
2020/XX/XX XX:XX:XX DEBUG : Chunked 'gcrypt-chunk:[REDACTED]': skip chunk "[REDACTED].rcc02" without meta object
2020/XX/XX XX:XX:XX DEBUG : Chunked 'gcrypt-chunk:[REDACTED]': skip chunk "[REDACTED].rcc03" without meta object
2020/XX/XX XX:XX:XX DEBUG : Chunked 'gcrypt-chunk:[REDACTED]': skip chunk "[REDACTED].rcc06" without meta object
2020/XX/XX XX:XX:XX NOTICE: [REDACTED]: Not copying as --dry-run
2020/XX/XX XX:XX:XX DEBUG : Chunked 'gcrypt-chunk:[REDACTED]': Waiting for checks to finish
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -795.1µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -628.1µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -934.8µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -473µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -643µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -250.1µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -655.1µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -976.7µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -734.8µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -333µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -725.8µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -48.9µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -468.9µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -430.9µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -45.2µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -298.1µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -961.7µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -920.2µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Size and modification time the same (differ by -568.3µs, within tolerance 1ms)
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : [REDACTED]: Unchanged skipping
2020/XX/XX XX:XX:XX DEBUG : Chunked 'gcrypt-chunk:[REDACTED]': Waiting for transfers to finish
2020/XX/XX XX:XX:XX DEBUG : Waiting for deletions to finish
Transferred: 0 / 0 Bytes, -, 0 Bytes/s, ETA -
Checks: 19 / 19, 100%
Transferred: 1 / 1, 100%
Elapsed time: 0.9s
2020/XX/XX XX:XX:XX INFO :
Transferred: 0 / 0 Bytes, -, 0 Bytes/s, ETA -
Checks: 19 / 19, 100%
Transferred: 1 / 1, 100%
Elapsed time: 0.9s
2020/XX/XX XX:XX:XX DEBUG : 6 go routines active