mv file/folder with blank-spaces in its name doesn't work - LFTP

I have 2 spaces:
My **Synology NAS**. And my **FTP**. If we assume that some files on my local NAS are also in my FTP repository, I want to move some files on my local NAS AND on my FTP on different folders. eg: _After downloading files from FTP to NAS_
**NAS:**
- **Move** from /volume1/Downloading/file001 to /volume1/Downloaded/file001 **FTP:**
- **Move** from /downloads/file001 to /downloads/Finished/file001 Every files on the NAS are moved at the right path : **OK**
On my FTP, only files/folders that doesn't contain blank spaces are moved : **KO** So here is a part of the script we need to know:
#!/bin/sh # Inits ficLog=/volume1/ScriptsAndOutputs/logFTPSeedibox.txt downloadingFolderPath=/volume1/Downloading downloadedFolderPath=/volume1/Downloaded ftpDestinationPath=FinishedTmp # Configuration : ftp / user / pass servFTP=server userFTP=user passFTP=password for filePath in "${downloadingFolderPath}"/* ; do # As filePath is the complete path of the file we need to get the file NAME fileName=basename "${filePath}" #Try to move it on FTP lftp ftp://${userFTP}:${passFTP}@${servFTP} -e 'set ssl:verify-certificate false;set file:charset utf8;set ftp:charset utf8;cd downloads;mv "${fileName}" "${ftpDestinationPath}"' res2=$? #Then we move file on the NAS mv "${filePath}" "${downloadedFolderPath}" done exit 0 Here is the output : + ficLog=/volume1/ScriptsAndOutputs/logFTPSeedibox.txt + downloadingFolderPath=/volume1/Downloading + downloadedFolderPath=/volume1/Downloaded + ftpDestinationPath=FinishedTmp + servFTP=server + userFTP=user + passFTP=password + for filePath in '"${downloadingFolderPath}"/*' ++ basename /volume1/Downloading/@eaDir + fileName=@eaDir + lftp ftp://user:password@server -e 'set ssl:verify-certificate false;set file:charset utf8;set ftp:charset utf8;cd downloads;mv "${fileName}" "${ftpDestinationPath}"' cd ok, cwd=/downloads mv ${fileName}=>${ftpDestinationPath} [Waiting for response...] mv: Access failed: 550 RNFR command failed. (${fileName}) + res2=1 + mv /volume1/Downloading/@eaDir /volume1/Downloaded mv: inter-device move failed: ‘/volume1/Downloading/@eaDir’ to ‘/volume1/Downloaded/@eaDir’; unable to remove target: Directory not empty + for filePath in '"${downloadingFolderPath}"/*' ++ basename '/volume1/Downloading/Folder With Files' + fileName='Folder With Files' + lftp ftp://user:password@server -e 'set ssl:verify-certificate false;set file:charset utf8;set ftp:charset utf8;cd downloads;mv "${fileName}" "${ftpDestinationPath}"' cd ok, cwd=/downloads mv ${fileName}=>${ftpDestinationPath} [Waiting for response...] mv: Access failed: 550 RNFR command failed. (${fileName}) + res2=1 + mv '/volume1/Downloading/Folder With Files' /volume1/Downloaded + for filePath in '"${downloadingFolderPath}"/*' ++ basename /volume1/Downloading/Test_no_spaces.txt + fileName=Test_no_spaces.txt + lftp ftp://user:password@server -e 'set ssl:verify-certificate false;set file:charset utf8;set ftp:charset utf8;cd downloads;mv "${fileName}" "${ftpDestinationPath}"' cd ok, cwd=/downloads mv ${fileName}=>${ftpDestinationPath} [Waiting for response...] mv: Access failed: 550 RNFR command failed. (${fileName}) + res2=1 + mv /volume1/Downloading/Test_no_spaces.txt /volume1/Downloaded + for filePath in '"${downloadingFolderPath}"/*' ++ basename '/volume1/Downloading/test_under et espaces.txt' + fileName='test_under et espaces.txt' + lftp ftp://user:password@server -e 'set ssl:verify-certificate false;set file:charset utf8;set ftp:charset utf8;cd downloads;mv "${fileName}" "${ftpDestinationPath}"' cd ok, cwd=/downloads mv ${fileName}=>${ftpDestinationPath} [Waiting for response...] mv: Access failed: 550 RNFR command failed. (${fileName}) + res2=1 + mv '/volume1/Downloading/test_under et espaces.txt' /volume1/Downloaded + exit 0 As you can see, it's working for any folder/file on the NAS but only for files/folders names without blank-spaces on the FTP. Can someone help me? Thanks.