Moving OneDrive data to your Nextcloud

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My wife wants to use Nextcloud as cloud storage.

My wife
My wife

The occupancy of OneDrive is about to exceed 100GB!
I want to escape from paying monthly fee!

You should help me with your strawberry pi!

My toy is Raspberry Pi, not strawberry pi.

I moved her OneDrive data 100GB to Nextcloud which is hosted by Raspberry Pi 4 in my home. 

This article is note of work.

I faced some troubles so to memorize how to resolve is good for someone who wants to do.

Steps to be done

Backing up data in OneDrive

I simply downloaded all data…

It took a few days…

If I knew REST API it were shorter… 

Copying data to Nextcloud

There are some steps.

1. Copying files to Nextcloud user directory
2. Making Nextcloud recognize these files
3. Creating thumbnails of image/video files if needed

Copying files to Nextcloud user director

 Any method is okey, I performed by SFTP because I already activated SSH and don’t want to install samba or other service.

If you extract zip files of OneDrive data in Linux host it may fails to extract multibyte files/directories.

Countermeasure is to use unar command.

To extract big file (>4GB) by unar command will output error.

Archive parsing failed! (Data is corrupted.)

I divided to some files before extracting.

Making Nextcloud recognize these files

This can be done by occ command.
Official reference 

Here you can see what I did.

sudo -u www-data php occ files:scan --path='/UserName/files'

I faced error.

An unhandled exception has been thrown:
OC\HintException: [0]: Memcache \OC\Memcache\APCu not available for local cache (Is the matching PHP module installed and enabled?)

Exactly apcu is deactivated.

php -i | grep -i apcu
Additional .ini files parsed => /usr/local/etc/php/conf.d/apcu.ini,
APCu Support => Disabled
APCu Debugging => Disabled

Activated by doing this.

echo "apc.enable_cli=1" > /usr/local/etc/php/conf.d/apcu.ini
echo "apc.enable=1" > /usr/local/etc/php/conf.d/apcu.ini

Try again.
Well done!

time sudo -u www-data php occ files:scan --path='/UserName/files'
The process control (PCNTL) extensions are required in case you want to interrupt long running commands - see
The current PHP memory limit is below the recommended value of 512MB.
Starting scan for user 1 out of 1 (UserName)
| Folders | Files | Elapsed time |
| 62      | 14356 | 00:02:22     |

real    2m23.709s
user    0m26.062s
sys     0m3.560s

Creating thumbnails of image/video files if needed

Thumbnail is dynamically created when you access to your Nextcloud folder which contains image/video files.
As you can imagine this will occupy CPU resources which is unignorable for IoT device like Raspberry Pi…

To avoid such high CPU load, Preview-Generator will help you.

You just need to install by administrator account in Nextcloud and do this command.

sudo -u www-data php occ preview:generate-all UserName

In my environment RAM is needed more,

PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 16384 bytes) in /var/www/html/lib/private/legacy/OC_Image.php on line 576

I increased available memory size and performed occ command again.

vim.tiny /usr/local/etc/php/php.ini
-memory_limit = 128M
+memory_limit = 512M

Duration time depends on how many and how big image/video files are.
I executed before going to bed and confirmed next morning.
– About 5 hours to complete in my case.

Image thumbnail is not generated

Perhaps jpeg/heic thumbnail is not created.

This article will help you if you are in the same trouble.

Video thumbnail is not generated

Perhaps video thumbnail in multibyte path directory is not generated.

This article shows you how to resolve.


How was it?

It needs duration time, but doesn’t need your work!

let’s do it, why not?


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