version 6.0 has not been supported in a very long time. Please upgrade to a more recent version and try again.

You can also check your Options - Advanced - Chunk Size. Possibly it's set too low and you are hitting the maximum number of chunks allowed. But you should be using a more recent version of the software.

This is the latest version of CloudBerry Explorer I'm finding available via in-app update or by downloading from https://www.msp360.com/explorer/windows/amazon-s3.aspx - 6.0.0.10 . If this is out of date, perhaps it needs to be updated. Also, there is no setting tab called "Advanced" in Options. I'm more concerned about this: - this appears to say the maximum upload for the free version is 5GB - am I wrong? And if I'm right, this has changed, and recently?

this is the error in the log:

2021-09-07 00:08:54,730 [UI] [1] NOTICE - Explorer started. Version: 6.0.0.10
2021-09-07 00:39:11,567 [CL] [32] WARN - New upload URL has been requested: https://XXXXXXXXX.backblaze.com/b2api/v1/b2_upload_file/XXXXXXXXXXXXX/c000_v0001084_t0028
2021-09-07 00:45:40,223 [CL] [6] WARN - New upload URL has been requested: https://XXXXXXXXXXXXX.backblaze.com/b2api/v1/b2_upload_file/XXXXXXXXXXXXX/c000_v0001020_t0033
2021-09-07 00:45:52,614 [Base] [6] ERROR - {
"code": "bad_request",
"message": "File size too big: 11593412608",
"status": 400
}
CloudBerryLab.Client.Backblaze.B2WebException
File size too big: 11593412608

System.Net.WebException
The remote server returned an error: (400) Bad Request.
at System.Net.HttpWebRequest.GetResponse()
at Hl.a(HH )

2021-09-07 00:45:52,676 [Base] [6] ERROR - Header Connection: close
2021-09-07 00:45:52,692 [Base] [6] ERROR - Header Content-Length: 91
2021-09-07 00:45:52,708 [Base] [6] ERROR - Header Cache-Control: max-age=0, no-cache, no-store
2021-09-07 00:45:52,708 [Base] [6] ERROR - Header Content-Type: application/json;charset=utf-8
2021-09-07 00:45:52,708 [Base] [6] ERROR - Header Date: Tue, 07 Sep 2021 07:46:02 GMT
2021-09-07 00:45:52,739 [CL] [6] ERROR - Command::Run failed:
Copy; Source:D:\XXXXXXXXXXXXX\XXXXXXXXXXXXX\XXXXXXXXXXXXX; Destination:XXXXXXXXXXXXX
CloudBerryLab.Base.Exceptions.BadRequestException: File size too big: 11593412608 ---> CloudBerryLab.Client.Backblaze.B2WebException: File size too big: 11593412608 ---> System.Net.WebException: The remote server returned an error: (400) Bad Request.
at System.Net.HttpWebRequest.GetResponse()
at Hl.a(HH )
--- End of inner exception stack trace ---
--- End of inner exception stack trace ---
at Hl.b(HH )
at Hl.C(HH )
at Hl.c(HH )
at Hm.eJ(HH )
at Hm.A(HH )
at OI.A(HH , Boolean )
at OI.A(String , String , Stream , jj )
at Ow.A(Stream , DateTime , jj )
at Om.A(Oh , Stream , Int64 , jS , EncryptionSettings , Boolean , DateTime , Fn`4 , Boolean )
at Ow.Ca(Stream , DateTime , lT )
at Om.HD(Stream , DateTime , lT , Func`1 )
at Om.Bw(OD , String , lT )
at nX.RunInternal()
at lU.fu()
2021-09-07 00:59:12,670 [UI] [1] INFO - CloudBerry Explorer for Amazon S3 - Freeware exited.
2021-09-07 09:44:22,273 [UI] [1] NOTICE -

Yes. Sorry. I thought you were using Backup. I do not recall a recent change to the maximum object size. What version of Explorer were you using previously?

I restored the previous executable from a backup and it reports version 5.9.1.192 in file details.

And you're confident that version 5.9 has no issues uploading a file of that size to B2? Could you verify with a full backup of that file?

I've been uploading and downloading files with it for 2 years, David. The files are in the bucket - I can see them from B2's web interface, and I can download and have downloaded them to other machines. Almost all of them were between 10 and 30 GB, with a few around 400-500GB. Here's what I think happened: v6 implemented a new limit of 5GB for the free version. There's no other explanation. I looked at the site in archive.org, and on Feb 26 of this year the site changed to what I assume is the V6 version, and this is the first time I see the chart with the limits as I posted above. It's got to be to push people to the paid version (which by the way, at archive.org I saw the price bump from $40 to $60 in 2020, too).

I have to say it's left a bad taste in my mouth, and it's not the first time that that's happened dealing with your company. You have every right to expect people to pay for your software and I understand that, but when you give the software away for free for many years and it works a certain way, then you let me update it to the latest version and it actually kills the very functionality I use it for without letting me know, it feels very bait-and-switchy.

In any case the problem is now moot. I paid 20 bucks for FileZilla Pro, and I'm back in business. But probably not with MSP360 going forward.

Thanks for your help.

I'll pass your comments on to the team. It's my understanding and I did confirm it with the engineers and the marketing team, that the 5 GB limit was in place for a very long time. If it turns out to be an issue related to B2 storage then I'll talk to the team about what options we have for you that won't cost you anything so you can upgrade. Stay tuned.

I appreciate it David. If there's a way to move to the functionality of the paid product, I would certainly prefer it to FileZilla Pro, which doesn't seem to implement large file transfers the same way. Is it possible that when the trial of 5.9.1.2 converted from Pro to Free, the ability to do large file transfers was somehow not disabled? Because what I'm finding with FZP is that it's failing on the big ones, and that is different from what I experienced with CloudBerry 5.9.1.2 - that was quite reliable. Honestly, I'll happily pay the $60 if I was wrong about the limits and I was somehow able to use the large file upload process without paying for it all this time. Like I said, you have the very reasonable expectation to paid for your work - if I got something for nothing here, I'll pay for it now.

That's what happened. When you trial the product, it trials in full Pro mode so you have access to all features and can make an informed decision about whether it's a good fit for your needs. I am guessing that is when you originally backed up the files to B2. When the trial ends, if you do not purchase a Pro license, the software falls back to freeware-mode and that's where you are seeing the limitation on maximum object size. The solution, which may not be exactly what you were hoping for, is to purchase the Pro version. Please refer to this matrix to understand Freeware versus Pro differences: https://www.msp360.com/explorer/licensing/

You also get compression and encryption as well as multi-threaded copy support which can help a lot when backing up large numbers of small files or very large files.

Please let me know if you have any other questions / concerns.

David, like I said, I've been happily uploading and downloading very large files every couple of days for 2 years, all the way up to the time I installed 6.0.0.10 on 9/2/2021. I think the 5.9.1.2 trial converted to free but simply failed to enforce the 5GB limit. It's odd, but it's the only explanation I can come up with.

okay I'll have the team verify and I'll get back to you. It may take a few days for them to get through some testing. The limitation was not added with 6.0 but it's possible you're running into another unknown issue, so let us check and I hope you can be patient while we look into it.

One quick question while we're waiting - I went ahead and bought the Explorer Pro product. Is there a way to move files between folders in the same B2 bucket without reuploading? I want to archive some old files to a different subfolder of the bucket I'm using.

You can open the same of different buckets in B2 in both panes of Explorer. You should see a Move option on the right-click context menu. The move operation may require the object is first copied locally and then moved back to B2. I would test on a file large enough that you can see if this happens since that's a concern. B2 used to not support moving objects. They may have added it recently, possibly when using S3 compatible buckets, but I'm not sure. If you see the data copied locally from Explorer, you may want to reach out to Backblaze and ask them - they may have such a capability from their management interface if available.