'Word has insufficient memory. Do you want to save Word Work File ***.tmp as'

I ran the First Aid check and no issues arose.

Not sure if this is relevant, but I also just remembered that a few weeks ago, I had this same issue when closing documents, except every time I clicked on a saved Word document to open, it would open a random other Word document from my computer (except it showed the correct document in the thumbnail). I could click on the same document 4 times in a row, and it would open 4 different documents, and none of them were the one it was meant to be. It seemed to have fixed itself the next day and I haven't had this issue since.

I showed it to the IT Help staff at uni and he was very perplexed by the problem but he couldn't fix it because he didn't know much at Macs.

This was his report:

Report:

Opening certain documents from Recent opened entirely different documents.
Mac needs an update to x.x.6 from x.x.5 High Sierra. Advised to do this.
Slowness seemed to originate from access files from iCloud, whether it was downloading cached files and not updating correctly, indexing is corrupted, unsure what.
Seemed to correct itself.
Network settings all correct.
No suspicious logon items.
Installed Malwarebytes to check for virus/malware - all clean.
Plenty of space on HDD.
Autosave is set for every 10 minutes. Word seems to hang roughly every 10 minutes.
Excel and Powerpoint work fine so don't see a point in reinstalling Office.
Issue seems to be with the connection to the iCloud service.
Only idea is to move the Documents folder off the iCloud and onto the laptop.
As this could cause other issues or might not resolve the problem, advised to take it to a Mac store.

I often have several Word and PPT documents open at once (probably 4-8 of them), could this be the issue? Also, I'm happy to get rid of any Adobe stuff on my computer but I don't know how (I installed a free trial of Adobe Photoshop Suite once and I thought I got rid of most of the files but apparently not, and I think I installed Adobe Reader last week for temporary usage).

I'll restart Recovery and run Disk Utility first aid now. I restarted the computer two days ago and this is what it says at the moment:

I do check the storage from time to time and I haven't seen significant fluctuations.

I have 55.34GB free space/available of 121.12GB on my Hard Drive. My RAM is 4GB 1600 MHz DDR3.

EtreCheck version: 5.0 (5008)

Report generated: 2018-09-27 09:03:57

Download EtreCheck from https://etrecheck.com

Runtime: 3:07

Performance: Good

Sandbox: Enabled

Full drive access: Disabled

Problem: Other problem

Description:

Roughly once a week, when I try to close a document (that I have been saving regularly throughout the few hours I have had that document open), I receive an error message saying 'Word cannot open the document: user does not have access privileges ([name of document]). When I click OK, I receive a new error message saying 'Word has insufficient memory. Do you want to save Word Work File ***.tmp as'. Regardless if I click 'Yes' or 'No', the document does not save the changes I have made (the changes that I had previously successfully saved are gone too) and I am unable to find this document under the new name it has given the .tmp document on my computer. Sometimes I am able to access the changes that I had saved earlier by going to iCloud.com and downloading them from my iCloud Drive.

Major Issues: None

Minor Issues:

These issues do not need immediate attention but they may indicate future problems.

High battery cycle count- Your battery may be losing capacity.

Clean up- There are orphan files that could be removed.

Unsigned files- There are unsigned software files installed. They appear to be legitimate but should be reviewed.

32-bit Apps- This machine has 32-bits apps that may have problems in the future.

Hardware Information:

MacBook Air (11-inch, Early 2015)

MacBook Air Model: MacBookAir7,1

1 1.6 GHz Intel Core i5 (i5-5250U) CPU: 2-core

4 GB RAM - Not upgradeable

BANK 0/DIMM0 - 2 GB DDR3 1600 ok

BANK 1/DIMM0 - 2 GB DDR3 1600 ok

Battery: Health = Normal - Cycle count = 808

Video Information:

Intel HD Graphics 6000 - VRAM: 1536 MB

Color LCD 1366 x 768

Drives:

disk0 - APPLE SSD SD0128F 121.33 GB (Solid State - TRIM: Yes)

Internal PCI 5.0 GT/s x2 Serial ATA

disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB

disk0s2 [APFS Container] 121.12 GB

disk1 [APFS Virtual drive] 121.12 GB (Shared by 4 volumes)

disk1s1 - Macintosh HD (APFS) (Shared - 88.42 GB used)

disk1s2 - Preboot (APFS) [APFS Preboot] (Shared)

disk1s3 - Recovery (APFS) [Recovery] (Shared)

disk1s4 - VM (APFS) [APFS VM] (Shared - 3.22 GB used)

Mounted Volumes:

disk1s1 - Macintosh HD 121.12 GB (28.82 GB free)

APFS

Mount point: /

disk1s4 - VM [APFS VM] (Shared - 3.22 GB used)

APFS

Mount point: /private/var/vm

Network:

Interface en0: Wi-Fi

802.11 a/b/g/n/ac

Interface en3: iPhone

Interface en2: Bluetooth PAN

Interface bridge0: Thunderbolt Bridge

System Software:

macOS High Sierra 10.13.6 (17G65)

Time since boot: About a day

Configuration Profiles:

Information not available

Security:

Unsigned Files:

Launchd: /Library/LaunchDaemons/com.microsoft.office.licensing.helper.plist

Executable: /Library/PrivilegedHelperTools/com.microsoft.office.licensing.helper

Details: Exact match found in the whitelist - probably OK

Launchd: /Library/LaunchDaemons/com.microsoft.office.licensingV2.helper.plist

Executable: /Library/PrivilegedHelperTools/com.microsoft.office.licensingV2.helper

Details: Exact match found in the whitelist - probably OK

32-bit Applications:

7 32-bit apps

Kernel Extensions:

/Library/Application Support/Malwarebytes/MBAM/Kext

MB_MBAM_Protection.kext (Malwarebytes Corporation, 3.4 - SDK 10.13)

System Launch Agents:

System Launch Daemons:

Launch Agents:

Launch Daemons:

User Launch Agents:

User Login Items:

WunderlistHelper (App Store - installed 2018-04-05)

(/Applications/Wunderlist.app/Contents/Library/LoginItems/WunderlistHelper.app)

iTunesHelper (Apple - installed 2018-07-26)

(/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app/Contents/MacOS/iTunesH elper)

Internet Plug-ins:

AdobeAAMDetect: 3.0.0.0 (installed 2016-10-30)

FlashPlayer-10.6: 31.0.0.108 (installed 2018-09-12)

QuickTime Plugin: 7.7.3 (installed 2018-08-23)

Flash Player: 31.0.0.108 (installed 2018-09-12)

SharePointBrowserPlugin: 14.6.1 (installed 2016-02-27)

Silverlight: 5.1.41212.0 (installed 2016-01-25)

JavaAppletPlugin: 15.0.1 (installed 2016-10-19)

3rd Party Preference Panes:

Flash Player (installed 2018-08-28)

Time Machine:

Time Machine information not available

Performance:

System Load: 1.71 (1 min ago) 1.89 (5 min ago) 1.97 (15 min ago)

Nominal I/O speed: 0.50 MB/s

File system: 58.48 seconds

Write speed: 126 MB/s

Read speed: 515 MB/s

CPU Usage:

Top Processes by CPU:

Top Processes by Memory:

Top Processes by Network Use:

Virtual Memory Information:

Software Installs (past 30 days):

Clean up:

/Library/LaunchAgents/com.adobe.AdobeCreativeCloud.plist

/Applications/Utilities/Adobe Creative Cloud/ACC/Creative Cloud.app/Contents/MacOS/Creative Cloud

Executable not found

/Library/LaunchAgents/com.adobe.AAM.Updater-1.0.plist

/Library/Application Support/Adobe/OOBE/PDApp/UWA/UpdaterStartupUtility

Executable not found

~/Library/LaunchAgents/com.adobe.AAM.Updater-1.0.plist

/Library/Application Support/Adobe/OOBE/PDApp/UWA/UpdaterStartupUtility

Executable not found

~/Library/LaunchAgents/com.adobe.ARM.***.plist

/Applications/Adobe Reader.app/Contents/MacOS/Updater/Adobe Reader Updater Helper.app/Contents/MacOS/Adobe Reader Updater Helper

Executable not found

End of report