[How to upload and download worlds.]

I see these methods don't work anymore. is there still a way to do this? If so, how? Tnt is taking over a minute and a half to explode and I'd like to transfer to a different server host.

[Server not starting]

How do I see what files have been recently edited? I didn't do it myself so I am not sure, and there are several .yml files that I see here. I am not sure how to spot an anomaly in any of them.

[Server not starting]

My server will not start. when I force hibernation and reset, it simply shows offline, and when I try to connect, it gives me this: (the error is the red text) I have tried many times. I was told it would be helpful to update the logs, so here they are: (POST CONTINUED BELOW, DO NOT STOP READING HERE)

[17:45:59] [main/FATAL]: Failed to start the minecraft server
org.bukkit.configuration.InvalidConfigurationException: mapping values are not allowed here
 in 'string', line 44, column 10:
        World: Void
             ^

    at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:59) ~[patched_1.16.3.jar:git-Paper-204]
    at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:160) ~[patched_1.16.3.jar:git-Paper-204]
    at org.bukkit.configuration.file.FileConfiguration.load(FileConfiguration.java:128) ~[patched_1.16.3.jar:git-Paper-204]
    at net.minecraft.server.v1_16_R2.Main.loadConfigFile(Main.java:230) ~[patched_1.16.3.jar:git-Paper-204]
    at net.minecraft.server.v1_16_R2.Main.main(Main.java:69) ~[patched_1.16.3.jar:git-Paper-204]
    at org.bukkit.craftbukkit.Main.main(Main.java:276) ~[patched_1.16.3.jar:git-Paper-204]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_212]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_212]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_212]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_212]
    at io.papermc.paperclip.Paperclip.main(Paperclip.java:57) ~[spigot.jar:?]
Caused by: org.yaml.snakeyaml.scanner.ScannerException: mapping values are not allowed here
 in 'string', line 44, column 10:
        World: Void
             ^

    at org.yaml.snakeyaml.scanner.ScannerImpl.fetchValue(ScannerImpl.java:870) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:358) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:227) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingKey.produce(ParserImpl.java:558) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:148) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:235) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:162) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.composer.Composer.composeValueNode(Composer.java:257) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.composer.Composer.composeMappingChildren(Composer.java:248) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:236) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:162) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.composer.Composer.getNode(Composer.java:95) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:119) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:150) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:472) ~[patched_1.16.3.jar:git-Paper-204]
    at org.yaml.snakeyaml.Yaml.load(Yaml.java:398) ~[patched_1.16.3.jar:git-Paper-204]
    at org.bukkit.configuration.file.YamlConfiguration.loadFromString(YamlConfiguration.java:57) ~[patched_1.16.3.jar:git-Paper-204]
    ... 10 more
I was told by a dev friend of mine that it would be necessary to reset the server, deleting everything and therefore anything that could be causing this issue. I would like a second opinion as I have many guests on the server who have put 100+Hours into it, and I do not want to let them down. Repair core files is not working, and we deleted a void world and some other things. the rest of the dashboard is simply unresponsive or uncooperative.

[unable to change MOTD]

I was trying to change it to 

§4§lSoaringMC!
§2Down for Maintenance : (
§r§l§4§nSZN 1 STARTING SOON!!!!

which should translate to:

SoaringMC!

Down for Maintenance

SZN 1 STARTING SOON!!!!

[unable to change MOTD]

Hi. I changed my MOTD once successfully, but now when I try to update it, it just goes back to the old thing. I cannot access the server.properties file to change it there, and nobody else seems to have has this issue, so I'm not sure what do.