First, fix the log settings.
Step 1: Delete all existing file access logs. If the log files are necessary, copy to another location.
1. From Settings, navigate to "Management" > "Logs".
2. Click 'Delete' to the right of "File Access Logs".
3. Click 'Yes'.
Note: If you want to copy log files to another location, follow the procedure below:
1. From Settings, navigate to "Management" > "Logs".
2. Click 'Edit'.
3. Enable "Share Link to Logs" and select the shared folder where the link will be created.
4. Access the shared folder that you have configured at step 3 and copy the "file.log" file to the desired location.
Step 2: Change the settings to save fewer file access logs.
1. From Settings, navigate to "Management" > "Logs".
2. Click 'Edit'.
3. Change archive rule settings to the following Buffalo-recommended values:
Units: "Size"
File Sizes: "100 MB"
Versions: "13"
Then, update the firmware.
https://www.buffalotech.com/support/downloads/terastation-5010-series-desktopYou are couple versions back.