Support intro
Sorry to hear you’re facing problems 
help.nextcloud.com is for home/non-enterprise users. If you’re running a business, paid support can be accessed via portal.nextcloud.com where we can ensure your business keeps running smoothly.
In order to help you as quickly as possible, before clicking Create Topic please provide as much of the below as you can. Feel free to use a pastebin service for logs, otherwise either indent short log examples with four spaces:
example
Or for longer, use three backticks above and below the code snippet:
longer
example
here
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (eg, 20.0.5): 22.1.1
Operating system and version (eg, Ubuntu 20.04): Linux 5.4.0-84-generic x86_64
Apache or nginx version (eg, Apache 2.4.25): Apache 2 .4
PHP version (eg, 7.4): 7.4.23
The issue you are facing:
I am using Nextcloud installed via snap with Backblaze B2 external storage, which is S3 compatible. When trying to enumerate folders, the process is extremely slow. The backblaze backend is quite quick when uploading files, so I am not sure where the problem lies, with Backblaze, or with Nextcloud. Potentially something has been misconfigured?
The output of your Nextcloud log in Admin > Logging:
https://pastebin.com/7YEWFeJ4
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'apps_paths' =>
array (
0 =>
array (
'path' => '/snap/nextcloud/current/htdocs/apps',
'url' => '/apps',
'writable' => false,
),
1 =>
array (
'path' => '/var/snap/nextcloud/current/nextcloud/extra-apps',
'url' => '/extra-apps',
'writable' => true,
),
),
'supportedDatabases' =>
array (
0 => 'mysql',
),
'memcache.locking' => '\\OC\\Memcache\\Redis',
'memcache.local' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => '/tmp/sockets/redis.sock',
'port' => 0,
),
'log_type' => 'file',
'logfile' => '/var/snap/nextcloud/current/logs/nextcloud.log',
'logfilemode' => 416,
'passwordsalt' => 'REDACTED',
'secret' => 'REDACTED',
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'cloud.domain.com',
3 => 'nextcloud.domain.com',
2 => 'nx.domain.com',
4 => '192.168.1.90',
),
'datadirectory' => '/var/snap/nextcloud/common/nextcloud/data',
'dbtype' => 'mysql',
'version' => '22.1.1.2',
'overwrite.cli.url' => 'http://localhost',
'dbname' => 'nextcloud',
'dbhost' => 'localhost:/tmp/sockets/mysql.sock',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => 'nextcloud',
'dbpassword' => 'REDACTED',
'installed' => true,
'instanceid' => 'oc20lvug4njw',
'maintenance' => false,
'mail_from_address' => 'support',
'mail_smtpmode' => 'smtp',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'domain.com',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'mail_smtphost' => 'smtp.gmail.com',
'mail_smtpsecure' => 'ssl',
'mail_smtpport' => '465',
'mail_smtpname' => 'REDACTED',
'mail_smtppassword' => 'REDACTED',
'loglevel' => 2,
);
The output of your Apache/nginx/system log in /var/log/____:
https://pastebin.com/dzgSdNz2