Can't update Edge 1040 to 12.11

It sounds like the update is failing in some way.

Is there any error log file in teh Garmin\Debug folder?

We could try going to 12.10 first by manually placing the update file for 12.10 in the Garmin folder

GUPDATE.GCD

thanks for trying to help me. 
I tried your version. yes, it says '12.10', but I have the same scenario - "Preparing update" for couple seconds, then restart and nothing is updated.

that's my LOG

[
{
"unit_id":"3417803624",
"product_name":"Edge 1040",
"software_part_number":"006-B3843-00",
"ms_since_epoch":1655303096000,
"system_version":"10.16",
"build_type":"PRODUCTION",
"backtrace":"
Function Address: 0x60ABF448
   Call Address at Function: 0x60ABF45E

Function Address: 0x60AB658C
   Call Address at Function: 0x60AB6668

Function Address: 0x60AB66B8
   Call Address at Function: 0x60AB6730

Function Address: 0x60AB74AA
   Call Address at Function: 0x60AB74C2

Function Address: 0x60AB77D8
   Call Address at Function: 0x60AB783C

Function Address: 0x60B08B50
   Call Address at Function: 0x60B08CA8

Function Address: 0x60B09648
   Call Address at Function: 0x60B09660

Function Address: 0x60A35A9C
   Call Address at Function: 0x60A35AB2

Function Address: 0x60A36C26
   Call Address at Function: 0x60A36C3E

Function Address: 0x60A369FE
   Call Address at Function: 0x60A36A16

Function Address: 0x60A3677C
   Call Address at Function: 0x60A36792

Function Address: 0x60143454
   Call Address at Function: 0x60143478

Function Address: 0x608F9616
   Call Address at Function: 0x608F9634

Function Address: 0x608F9F22
   Call Address at Function: 0x608F9F3A

Function Address: 0x608F9D46
   Call Address at Function: 0x608F9D5E

Function Address: 0x608F9B98
   Call Address at Function: 0x608F9BAE

Function Address: 0x60143454
   Call Address at Function: 0x60143478

Function Address: 0x60175ADA
   Call Address at Function: 0x60175B48

",
"error_cause":"RTL Trap",
"proprietary_info":{
    "Commit ID":"14b77a41d1d19b0b495e4ba44ec1219ad58e101c",
    "Time":"2022-6-15 17:24:56",
    "Project Specific":"N/A",
    "RTL Error Number":"6E5D8024",
    "Error Message":"D00E59E8,60DDC978,D00E59EC,60DDC978,62E20000,00000001,00000000,6230F704,D00E59E8,D00E59A8,61134F5C,D00E59A8,D00E59B8,6230F6C0,60AB6669,60ABF45E,800E003F",
    "Task Name":"cfx background ",
    "Saved SP":"6230F6C0",
    "Saved LR":"60AB6669",
    "Saved PC":"60ABF45E",
    "R[0]":"D00E59E8",
    "R[1]":"60DDC978",
    "R[2]":"D00E59EC",
    "R[3]":"60DDC978",
    "R[4]":"62E20000",
    "R[5]":"00000001",
    "R[6]":"00000000",
    "R[7]":"6230F704",
    "R[8]":"D00E59E8",
    "R[9]":"D00E59A8",
    "R[10]":"61134F5C",
    "R[11]":"D00E59A8",
    "R[12]":"D00E59B8",
    "R[13]":"6230F6C0",
    "R[14]":"60AB6669",
    "R[15]":"60ABF45E",
    "cpsr":"800E003F"
    }

}
]

So the first thing the update does before it applies the new software is to backup your existing data.

I'm thinking something might be wrong with one of the files in the directories it is backing up.

If you could zip up some of the folders under the Garmin directory and provide them that would be great.

Locations

Metrics

Records

Settings

Sports

Totals

YES!
That helped. thank you I upgraded.
All the best to you!)
P.S but last answer about USB Mode without backup is disappear

Did you import the profiles you were using or did you name them on the unit?

Something odd on the form let me repost for others.

unit named it by itself (from templates), I mean it's names of profiles in Russian. "ДОРОЖНЫЙ" = "Road", "ГРАВИЙ" = "Gravel"

I created throw 
Menu -> Activity Profiles ->Create New -> Create from Template -> (screenshots)

Yea. Fine. You solved my issue. If you need help to investigate a source of my problem - let me know.