Local storage being used for uploads from sdcard

### Steps to reproduce
Preconditions:
- Only approx. 1GB space left on the internal storage.
- Big video file with approx. 800MB on SDCard.
- I am currently beta tester of the Android App using 3.11.1 RC1 (April, 16, 2020).
- Same issue has already been closed without action: https://github.com/nextcloud/android/issues/351

Set up auto-upload for the directory containing the 800MB video file using "Upload already existing data". (I did this unintentionally. Actually I have already uploaded all the file before...)

### Expected behaviour
Uploads gets done.

### Actual behaviour
Uploads fails with message: "File XYZ could not be copied to nextcloud local folder"

## Server configuration detail

**Operating system:** Linux 4.12.14-lp151.28.44-default #1 SMP Fri Mar 20 18:20:20 UTC 2020 (dbf1aea) x86_64

**Webserver:** nginx/1.14.2 (fpm-fcgi)

**Database:** mysql 10.2.31

**PHP version:**

7.2.5
Modules loaded: Core, date, libxml, pcre, filter, hash, Reflection, SPL, session, SimpleXML, standard, xml, mysqlnd, cgi-fcgi, apcu, bz2, ctype, curl, dom, mbstring, fileinfo, gd, gettext, iconv, imagick, intl, json, exif, mysqli, openssl, pcntl, PDO, pdo_mysql, pdo_sqlite, posix, redis, sqlite3, tokenizer, xmlreader, xmlwriter, zip, zlib, Zend OPcache

**Nextcloud version:** 18.0.3 - 18.0.3.0

**Updated from an older Nextcloud/ownCloud or fresh install:** No

**Where did you install Nextcloud from:** source

Signing status

Array
(
)

List of activated apps

```
Enabled:
- accessibility: 1.4.0
- activity: 2.11.0
- calendar: 2.0.3
- caniupdate: 0.2.0
- cloud_federation_api: 1.1.0
- comments: 1.8.0
- contacts: 3.3.0
- dav: 1.14.0
- documentserver_community: 0.1.5
- federatedfilesharing: 1.8.0
- federation: 1.8.0
- files: 1.13.1
- files_external: 1.9.0
- files_pdfviewer: 1.7.0
- files_rightclick: 0.15.2
- files_sharing: 1.10.1
- files_trashbin: 1.8.0
- files_versions: 1.11.0
- files_videoplayer: 1.7.0
- firstrunwizard: 2.7.0
- impersonate: 1.5.0
- issuetemplate: 0.6.0
- keeweb: 0.6.2
- logreader: 2.3.0
- lookup_server_connector: 1.6.0
- mail: 1.3.2
- maps: 0.1.6
- metadata: 0.11.1
- news: 14.1.3
- nextcloud_announcements: 1.7.0
- notifications: 2.6.0
- oauth2: 1.6.0
- password_policy: 1.8.0
- photos: 1.0.0
- polls: 1.3.0
- previewgenerator: 2.3.0
- privacy: 1.2.0
- provisioning_api: 1.8.0
- ransomware_protection: 1.6.1
- recommendations: 0.6.0
- serverinfo: 1.8.0
- settings: 1.0.0
- sharebymail: 1.8.0
- spreed: 8.0.8
- support: 1.1.0
- survey_client: 1.6.0
- systemtags: 1.8.0
- tasks: 0.12.1
- text: 2.0.0
- theming: 1.9.0
- twofactor_backupcodes: 1.7.0
- twofactor_totp: 4.1.3
- twofactor_u2f: 5.1.0
- updatenotification: 1.8.0
- user_external: 0.9.1
- viewer: 1.2.0
- workflowengine: 2.0.0
Disabled:
- admin_audit
- bruteforcesettings
- encryption
- onlyoffice
- ransomware_detection
- user_ldap

```

Configuration (config/config.php)

```
{
"instanceid": "***REMOVED SENSITIVE VALUE***",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"localhost",
"cloud.gr0ssmann.de",
"192.168.179.31"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "mysql",
"version": "18.0.3.0",
"overwrite.cli.url": "https:\/\/cloud.gr0ssmann.de\/nextcloud",
"overwriteprotocol": "https",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbport": "",
"dbtableprefix": "oc_",
"mysql.utf8mb4": true,
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"memcache.local": "\\OC\\Memcache\\APCu",
"filelocking.enabled": true,
"memcache.locking": "\\OC\\Memcache\\Redis",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"port": 0,
"timeout": 0
},
"logtimezone": "Europe\/Berlin",
"default_language": "de_DE",
"enable_previews": true,
"enabledPreviewProviders": [
"OC\\Preview\\PNG",
"OC\\Preview\\JPEG",
"OC\\Preview\\GIF",
"OC\\Preview\\HEIC",
"OC\\Preview\\BMP",
"OC\\Preview\\XBitmap",
"OC\\Preview\\MP3",
"OC\\Preview\\TXT",
"OC\\Preview\\MarkDown"
],
"maintenance": false,
"theme": "",
"loglevel": 2,
"default_locale": "de",
"app_install_overwrite": [
"ransomware_detection",
"caniupdate"
],
"auth.bruteforce.protection.enabled": false,
"preview_max_x": "2048",
"preview_max_y": "2048",
"jpeg_quality": "60",
"mail_smtpmode": "smtp",
"mail_smtpauthtype": "LOGIN",
"mail_sendmailmode": "smtp",
"mail_smtpauth": 1,
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "587",
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtpsecure": "tls",
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
"updater.release.channel": "stable"
}
```

**Are you using external storage, if yes which one:** No

**Are you using encryption:**

**Are you using an external user-backend, if yes which one:** Webdav

## Client configuration

**Browser:**

**Operating system:**

## Logs

Web server error log

```
Nothing related to this issue.
```

Nextcloud log

```
Nothing related to this issue.
```

Browser log

Nothing related to this issue.